Single ring drivetrains are becoming increasingly popular, particular on mountain bikes, where wide range cassettes no make it possible to have their cake and eat it; a simple, reliable drivetrain with a massive gear range. Dedicated chainrings with narrow-wide teeth are essential for smooth operation and optimal chain retention. AbsoluteBlack specialize in cutting edge chainring technology and their Oval XT M8000/MT700 Chainrings are some of the best around.Oval shaping improves efficiency and traction, keeping your legs fresher for longerLightweight, CNC-machined 7075 aluminium construction is incredibly durableNarrow-wide tooth profile provides excellent chain retentionOnly suitable for 12-speed Shimano Hyperglide+ ChainsSpecifically chamferred design runs smoothly in even the muddiest conditionsAbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. Using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality of that varies from 10.2 to 14.4% depending on chainring size for optimal performance. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you a smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. Not only is this more efficient, the improved smoothness of your power delivery means you can benefit from increased traction in slippery conditions, which can mean the difference between cresting a technical climb or not.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with a specifically chamferred design to help clear mud in wet conditions while still providing excellent chain retention. Chain retention is so good that absoluteBlack are confident you can run the chainring without a chain guide. This chainring is only compatible with 12-speed Shimano Hyperglide+ Chains. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need a quality chainring for your 1x drivetrain, look no further than absoluteBlack!
Single ring drivetrains are becoming increasingly popular, particular on mountain bikes, where wide range cassettes no make it possible to have their cake and eat it; a simple, reliable drivetrain with a massive gear range. Dedicated chainrings with narrow-wide teeth are essential for smooth operation and optimal chain retention. AbsoluteBlack specialize in cutting edge chainring technology and their Oval XT M8000/MT700 Chainrings are some of the best around.Oval shaping improves efficiency and traction, keeping your legs fresher for longerLightweight, CNC-machined 7075 aluminium construction is incredibly durableNarrow-wide tooth profile provides excellent chain retentionOnly suitable for 12-speed Shimano Hyperglide+ ChainsSpecifically chamferred design runs smoothly in even the muddiest conditionsAbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. Using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality of that varies from 10.2 to 14.4% depending on chainring size for optimal performance. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you a smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. Not only is this more efficient, the improved smoothness of your power delivery means you can benefit from increased traction in slippery conditions, which can mean the difference between cresting a technical climb or not.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with a specifically chamferred design to help clear mud in wet conditions while still providing excellent chain retention. Chain retention is so good that absoluteBlack are confident you can run the chainring without a chain guide. This chainring is only compatible with 12-speed Shimano Hyperglide+ Chains. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need a quality chainring for your 1x drivetrain, look no further than absoluteBlack!
Single ring drivetrains are becoming increasingly popular, particular on mountain bikes, where wide range cassettes no make it possible to have their cake and eat it; a simple, reliable drivetrain with a massive gear range. Dedicated chainrings with narrow-wide teeth are essential for smooth operation and optimal chain retention. AbsoluteBlack specialize in cutting edge chainring technology and their Oval XT M8000/MT700 Chainrings are some of the best around.Oval shaping improves efficiency and traction, keeping your legs fresher for longerLightweight, CNC-machined 7075 aluminium construction is incredibly durableNarrow-wide tooth profile provides excellent chain retentionOnly suitable for 12-speed Shimano Hyperglide+ ChainsSpecifically chamferred design runs smoothly in even the muddiest conditionsAbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. Using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality of that varies from 10.2 to 14.4% depending on chainring size for optimal performance. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you a smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. Not only is this more efficient, the improved smoothness of your power delivery means you can benefit from increased traction in slippery conditions, which can mean the difference between cresting a technical climb or not.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with a specifically chamferred design to help clear mud in wet conditions while still providing excellent chain retention. Chain retention is so good that absoluteBlack are confident you can run the chainring without a chain guide. This chainring is only compatible with 12-speed Shimano Hyperglide+ Chains. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need a quality chainring for your 1x drivetrain, look no further than absoluteBlack!
Single ring drivetrains are becoming increasingly popular, particular on mountain bikes, where wide range cassettes no make it possible to have their cake and eat it; a simple, reliable drivetrain with a massive gear range. Dedicated chainrings with narrow-wide teeth are essential for smooth operation and optimal chain retention. AbsoluteBlack specialize in cutting edge chainring technology and their Oval XT M8000/MT700 Chainrings are some of the best around.Oval shaping improves efficiency and traction, keeping your legs fresher for longerLightweight, CNC-machined 7075 aluminium construction is incredibly durableNarrow-wide tooth profile provides excellent chain retentionCompatible with 9, 10, 11 and 12 speed drivetrains - not suitable for 12-speed Shimano Hyperglide+ ChainsSpecifically chamferred design runs smoothly in even the muddiest conditionsAbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. Using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality of that varies from 10.2 to 14.4% depending on chainring size for optimal performance. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you a smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. Not only is this more efficient, the improved smoothness of your power delivery means you can benefit from increased traction in slippery conditions, which can mean the difference between cresting a technical climb or not.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with a specifically chamferred design to help clear mud in wet conditions while still providing excellent chain retention. Chain retention is so good that absoluteBlack are confident you can run the chainring without a chain guide. Compatible with 9, 10, 11 and 12 speed drivetrains, the chainrings can also be used with single speed chains. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need a quality chainring for your 1x drivetrain, look no further than absoluteBlack!
Single ring drivetrains are becoming increasingly popular, particular on mountain bikes, where wide range cassettes no make it possible to have their cake and eat it; a simple, reliable drivetrain with a massive gear range. Dedicated chainrings with narrow-wide teeth are essential for smooth operation and optimal chain retention. AbsoluteBlack specialize in cutting edge chainring technology and their Oval XT M8000/MT700 Chainrings are some of the best around.Oval shaping improves efficiency and traction, keeping your legs fresher for longerLightweight, CNC-machined 7075 aluminium construction is incredibly durableNarrow-wide tooth profile provides excellent chain retentionCompatible with 9, 10, 11 and 12 speed drivetrains - not suitable for 12-speed Shimano Hyperglide+ ChainsSpecifically chamferred design runs smoothly in even the muddiest conditionsAbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. Using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality of that varies from 10.2 to 14.4% depending on chainring size for optimal performance. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you a smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. Not only is this more efficient, the improved smoothness of your power delivery means you can benefit from increased traction in slippery conditions, which can mean the difference between cresting a technical climb or not.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with a specifically chamferred design to help clear mud in wet conditions while still providing excellent chain retention. Chain retention is so good that absoluteBlack are confident you can run the chainring without a chain guide. Compatible with 9, 10, 11 and 12 speed drivetrains, the chainrings can also be used with single speed chains. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need a quality chainring for your 1x drivetrain, look no further than absoluteBlack!
Single ring drivetrains are becoming increasingly popular, particular on mountain bikes, where wide range cassettes no make it possible to have their cake and eat it; a simple, reliable drivetrain with a massive gear range. Dedicated chainrings with narrow-wide teeth are essential for smooth operation and optimal chain retention. AbsoluteBlack specialize in cutting edge chainring technology and their Oval XT M8000/MT700 Chainrings are some of the best around.Oval shaping improves efficiency and traction, keeping your legs fresher for longerLightweight, CNC-machined 7075 aluminium construction is incredibly durableNarrow-wide tooth profile provides excellent chain retentionCompatible with 9, 10, 11 and 12 speed drivetrains - not suitable for 12-speed Shimano Hyperglide+ ChainsSpecifically chamferred design runs smoothly in even the muddiest conditionsAbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. Using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality of that varies from 10.2 to 14.4% depending on chainring size for optimal performance. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you a smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. Not only is this more efficient, the improved smoothness of your power delivery means you can benefit from increased traction in slippery conditions, which can mean the difference between cresting a technical climb or not.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with a specifically chamferred design to help clear mud in wet conditions while still providing excellent chain retention. Chain retention is so good that absoluteBlack are confident you can run the chainring without a chain guide. Compatible with 9, 10, 11 and 12 speed drivetrains, the chainrings can also be used with single speed chains. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need a quality chainring for your 1x drivetrain, look no further than absoluteBlack!
Single ring drivetrains are becoming increasingly popular, particular on mountain bikes, where wide range cassettes no make it possible to have their cake and eat it; a simple, reliable drivetrain with a massive gear range. Dedicated chainrings with narrow-wide teeth are essential for smooth operation and optimal chain retention. AbsoluteBlack specialize in cutting edge chainring technology and their Oval XT M8000/MT700 Chainrings are some of the best around.Oval shaping improves efficiency and traction, keeping your legs fresher for longerLightweight, CNC-machined 7075 aluminium construction is incredibly durableNarrow-wide tooth profile provides excellent chain retentionCompatible with 9, 10, 11 and 12 speed drivetrains - not suitable for 12-speed Shimano Hyperglide+ ChainsSpecifically chamferred design runs smoothly in even the muddiest conditionsAbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. Using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality of that varies from 10.2 to 14.4% depending on chainring size for optimal performance. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you a smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. Not only is this more efficient, the improved smoothness of your power delivery means you can benefit from increased traction in slippery conditions, which can mean the difference between cresting a technical climb or not.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with a specifically chamferred design to help clear mud in wet conditions while still providing excellent chain retention. Chain retention is so good that absoluteBlack are confident you can run the chainring without a chain guide. Compatible with 9, 10, 11 and 12 speed drivetrains, the chainrings can also be used with single speed chains. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need a quality chainring for your 1x drivetrain, look no further than absoluteBlack!
Single ring drivetrains are becoming increasingly popular, particular on mountain bikes, where wide range cassettes no make it possible to have their cake and eat it; a simple, reliable drivetrain with a massive gear range. Dedicated chainrings with narrow-wide teeth are essential for smooth operation and optimal chain retention. AbsoluteBlack specialize in cutting edge chainring technology and their Oval XT M8000/MT700 Chainrings are some of the best around.Oval shaping improves efficiency and traction, keeping your legs fresher for longerLightweight, CNC-machined 7075 aluminium construction is incredibly durableNarrow-wide tooth profile provides excellent chain retentionOnly suitable for 12-speed Shimano Hyperglide+ ChainsSpecifically chamferred design runs smoothly in even the muddiest conditionsAbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. Using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality of that varies from 10.2 to 14.4% depending on chainring size for optimal performance. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you a smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. Not only is this more efficient, the improved smoothness of your power delivery means you can benefit from increased traction in slippery conditions, which can mean the difference between cresting a technical climb or not.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with a specifically chamferred design to help clear mud in wet conditions while still providing excellent chain retention. Chain retention is so good that absoluteBlack are confident you can run the chainring without a chain guide. This chainring is only compatible with 12-speed Shimano Hyperglide+ Chains. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need a quality chainring for your 1x drivetrain, look no further than absoluteBlack!
Our premium 1X Rotor 76bcd compatible Oval chainrings are designed for Rotor REX cranks with their original 1X spider. They are lighter and stiffer compared to the original chainring due to one optimized mounting position only. This enabled us to develop better performing chainring with super smooth pedaling sensation.Size (Mass +/-1g):30T (44g), 32T (49g), 34T(58g)Compatibility:All ROTOR REX cranks with Rotor 76bcd spider (Not compatible with Sram 76bcd cranks) 9, 10, 11 and 12spd Eagle compatible.Material:CNC machined 7075 Txxx Aluminum. Long-lasting construction. Mud optimized.Chainline:Perfect 49mmOvality:Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead center) Patent PendingAdvantages of our oval chainrings:Finest design to provide excellent weight to strength ratio,Lighter than original Rotor chainrings.,One of a kind special oval shape (Patent Pending),Greatly improves traction and climbing abilities,Unique Patent Pending alternate wide and narrow teeth profiles to keep your chain in place for minimum 12 months!,Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically,Superb quality and great look.,You will not "feel" the oval shape at all,Reduces stress on knees,Only one chainring position. We optimized this chainring for best performance, so adjustable timing is not needed making the installation easy ..What to expect when moving from Rotor chainring to absoluteBlack oneAlmost all of our customers who tried Rotor before and now are using absoluteBlack, claim absoluteBlack chainrings deliver smoother pedaling sensation and allow them to pedal harder for longer. This derives from the fact that both companies have different objectives when designing the chainring. We focus on producing super smooth pedaling sensation that translates to higher cadence, increased speed, less stress on the knees and less tired legs after long ride. Rotor from the other hand focuses their efforts on theoretical gains in power and design their products with this in mind. While power gains are still not proven to this day; smoother pedaling is and you will be able to feel it yourself.How to mount Rotor compatible Oval chainring:It's very simple. You need to mount absoluteBlack chainring exactly the same way as you did with your original Rotor ring. There are four torx bolts that needs to be unscrewed. Remove old chainring and put new one in. Mount the screws back.The most advanced, Patent Pending alternate wide and narrow teeth profile currently produced, guarantee minimum 12 months of excellent chain retention capabilities! We mean it. Always use a new chain with a new chainring.It is ideal for 1x 9/10/11/12 system and Singlespeeds!. Oval (elliptical) chainring does not compromise the work of clutch mechanism in rear derailleur(video at the bottom). It also does not require chain tensioner when using in singlespeed application. Riding out of saddle on the uphill will become more pleasant. These chainrings also help you to recover after knee injuries as pedaling becomes smoother and less exhausting. It is the most advanced oval chainring currently on the market.Chain options:10, 11 or 12spd chain for geared bike or 6-8 spd for SS. If used in 1x9 drivetrain - 10spd chain must be used to obtain the performance. (yes - 10spd chain will work great on 9spd cassette)Chainguide needed?No. But if you want one then chain guide should have 2 teeth more capacity than nominal oval ring size.
AbsoluteBlack specialize in cutting edge chainring technology and their Oval R9100/R8000 Chainrings are some of the best around. Designed to be the ultimate oval chainring, absoluteBlack chainrings are stiffer, stronger, lighter and smoother shifting than any others on the market and are ideal for road riders looking for every possible advantage.Lightweight, CNC-machined 7075 aluminium construction is incredibly durableOval shaping improves efficiency and traction, keeping your legs fresher for longerCompatible with 9, 10, 11 and 12 speed drivetrains6 point shift ramps and stiff construction provide extremely smooth shifting under loadHelps maintain a better cadence when climbing reducing chainring shifts by at least 15%AbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. By using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality varying from 6.5 to 11.4%. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. This is more efficient than regular round chainrings and helps you ride smoother, faster, for longer.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with intricate shifting ramps to ensure every gear change is as slick as possible. Shifting is so slick that you can hardly tell the difference between absoluteBlack's oval chainrings and the rings that will come as standard with the cranks. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need quality replacement chainrings for your drivetrain, look no further than absoluteBlack!
AbsoluteBlack specialize in cutting edge chainring technology and their Oval R9100/R8000 Chainrings are some of the best around. Designed to be the ultimate oval chainring, absoluteBlack chainrings are stiffer, stronger, lighter and smoother shifting than any others on the market and are ideal for road riders looking for every possible advantage.Lightweight, CNC-machined 7075 aluminium construction is incredibly durableOval shaping improves efficiency and traction, keeping your legs fresher for longerCompatible with 9, 10, 11 and 12 speed drivetrains6 point shift ramps and stiff construction provide extremely smooth shifting under loadHelps maintain a better cadence when climbing reducing chainring shifts by at least 15%AbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. By using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality varying from 6.5 to 11.4%. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. This is more efficient than regular round chainrings and helps you ride smoother, faster, for longer.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with intricate shifting ramps to ensure every gear change is as slick as possible. Shifting is so slick that you can hardly tell the difference between absoluteBlack's oval chainrings and the rings that will come as standard with the cranks. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need quality replacement chainrings for your drivetrain, look no further than absoluteBlack!
AbsoluteBlack specialize in cutting edge chainring technology and their Oval R9100/R8000 Chainrings are some of the best around. Designed to be the ultimate oval chainring, absoluteBlack chainrings are stiffer, stronger, lighter and smoother shifting than any others on the market and are ideal for road riders looking for every possible advantage.Lightweight, CNC-machined 7075 aluminium construction is incredibly durableOval shaping improves efficiency and traction, keeping your legs fresher for longerCompatible with 9, 10, 11 and 12 speed drivetrains6 point shift ramps and stiff construction provide extremely smooth shifting under loadHelps maintain a better cadence when climbing reducing chainring shifts by at least 15%AbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. By using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality varying from 6.5 to 11.4%. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. This is more efficient than regular round chainrings and helps you ride smoother, faster, for longer.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with intricate shifting ramps to ensure every gear change is as slick as possible. Shifting is so slick that you can hardly tell the difference between absoluteBlack's oval chainrings and the rings that will come as standard with the cranks. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need quality replacement chainrings for your drivetrain, look no further than absoluteBlack!
AbsoluteBlack specialize in cutting edge chainring technology and their Oval R9100/R8000 Chainrings are some of the best around. Designed to be the ultimate oval chainring, absoluteBlack chainrings are stiffer, stronger, lighter and smoother shifting than any others on the market and are ideal for road riders looking for every possible advantage.Lightweight, CNC-machined 7075 aluminium construction is incredibly durableOval shaping improves efficiency and traction, keeping your legs fresher for longerCompatible with 9, 10, 11 and 12 speed drivetrains6 point shift ramps and stiff construction provide extremely smooth shifting under loadHelps maintain a better cadence when climbing reducing chainring shifts by at least 15%AbsoluteBlack's chainrings are some of the best you can buy, with cutting edge design and incredible quality and durability. By using an oval profile, rather than a traditional round chainring, absoluteBlack's Oval Chainrings feature an ovality varying from 6.5 to 11.4%. This reduces stress on your knees and helps keep your legs fresher for longer by effectively giving you smaller chainring in the weaker part of your pedal stroke and a bigger chainring in the most powerful part. This is more efficient than regular round chainrings and helps you ride smoother, faster, for longer.CNC-machined from 7075 aluminium, the chainrings are extremely lightweight yet also incredibly durable, with intricate shifting ramps to ensure every gear change is as slick as possible. Shifting is so slick that you can hardly tell the difference between absoluteBlack's oval chainrings and the rings that will come as standard with the cranks. AbsoluteBlack chainrings are beautiful to behold, with exquisite machining, quality anodised finishes and performance to match the looks. If you need quality replacement chainrings for your drivetrain, look no further than absoluteBlack!
Race Face OVAL chainring.Our premium 1X RaceFace direct mount Oval chainrings are designed for CINCH system RaceFace uses to mount chainring directly to the crank. If you have 4 arm RF crank, look at 104bcd Oval ring.CNC machined 7075 Txxx Aluminum. Long-lasting construction.,Great traction at the fraction of the price ! Narrow Wide tooth profile.,6mm Offset.Compatibility..RaceFace Cinch system cranks. RF Next SL, RF SIXC, RF Turbine, RF Atlas, AEFFECT CINCH cranks. Fits Boost148 frames as well.
absoluteBLACK Premium Shimano 110/4 bcd compatible oval chainrings are designed for new type of Shimano cranks Dura-Ace 9100 & Ultegra 8000 only. These are finest oval chainrings on the market in terms of shifting, smoothness of pedaling and manufacturing quality. (They can be also retrofitted to 9000 and 6800 cranks).Size (Mass +/-1g):34T (31g), 36T (37g), 38T (41g), 39T (42g), 50T (120g), 52T (137g), 53T(139g) Compatibility:Shimano Dura-Ace 9100, R9150 Di2 and Ultegra 8000, R8050 Di2. They can also retrofit 9000 and 6800 cranks but use bolt covers for best appearance.Bolts:For Outer chainring please order "Long bolts" from us OR Bolt CoversChanging Inner chainring to oval only? use original boltsMaterial & Finis:CNC machined 7075 Txxx Aluminum. Long-lasting construction. Type II anodizingOvality:Optimized to each size separately. 34T- 6.5% ; 36T, 38T, 39T- 11.4%, 50/52/53T - 10-11.2% ; Timing of 108 -110.5° after TDC (top dead center) - Ideal for road climbing. Patent PendingIMPORTANTRamps on big rings are specially configured for combinations: 50/34, 52/36, 52/38, 53/39T If you wish to use other configuration it will also work, but shifting will be slower and may require more "adjustments" of front dérailleur to be acceptable. Also remember that front dérailleur can only accept max 16T difference between 2 chainrings - this is how Shimano and Sram designed them.Advantages of Absolute Black Road Oval chainrings:One of a kind special oval shape that helps you climb easier and faster (Patent Pending),Over 15% stiffer than Rotor Qrings due to thicker, 5mm construction,Bespoke Absolute Black 6 point ramp and recess shifting design shifts better than any other brand and model of oval chainring,Finest design that provides excellent strength to weight ratio,You will not "feel" the oval shape while pedaling,Your pedaling action will feel smoother,Helps reduce stress on knees and helping your legs remain fresher for longer,You will be able to maintain better cadence while climbing,Reduces possibility of leg cramps,You will reduce chainring/cog shifts by at least 15%.What size should I choose?34T inner chainring should be used with 50T outer ring. It has 6.5% ovality. Use a 34T to help with spinning higher cadence and hilly terrain.36T inner chainring can be used with 50 or 52T outer ring. It has 11.4% ovality. Use a 36T if you’re a strong rider or for rolling terrain.38T inner chainring should be used with 52T outer ring. It has 11.4% ovality. Use a 38T if you’re a very strong rider or for flat terrain.39T inner chainring should be used with 53T outer ring. It has 11% ovality. Use a 39T if you’re a very strong rider or for flat terrain.50T outer chainring – Choose this size if you ride for pleasure or sportive events. This is the most versatile and comfortable size.52T outer chainring - if you race and feel strong, it's the classic outer chainring size and a great option for experienced riders.53T outer chainring - if you race and feel very strong, it's the classic outer chainring size and a great option for powerful riders.Remember when selecting your chainring sizes - it's not about what others use, but about ensuring YOUR ability to maintain a comfortable and effective cadence across the terrain you ride most often. If you ride chainrings that are too large (round or oval), your cadence will be lower. This can affect your performance by prematurely tiring your legs and possibly lead to stress injury in your knee joints.Shifting quality and technologyBoth, inner and outer oval chainrings are optimized with smooth shifting in mind. This is why the back of the Absolute Black Oval road chainring does not feature cutouts, like other oval products on the market. Instead, we design smooth angled surfaces, to help chain to slide quickly and precisely between chainrings. Absolute Black outer oval chainrings have 6 up-shifting ramps, for easy and quick gear change, even under load. Each outer chainring also features 12 down-shifting points. Instead of steel shifting pins we use a CNC machined "ramp and recess" solution. Special raised ramps work in conjunction with the tooth recesses to stabilize the chain when shifting. Our oval chainrings DO NOT require any modification to the front dérailleur in order to work properly (apart from small standard adjustment)Why our oval chainrings workOur premium Oval chainrings work because riders do not produce power evenly through a pedal stroke –the musculature of human legs makes it difficult to maintain an even power delivery to a round chainring. Believe it (or not), but a round chainring doesn't transfer torque to your rear wheel as smoothly as an Oval one. Oval rings work with the natural human physiology. Oval chainrings maximize the part of the stroke where power is produced and minimize resistance where it isn't. As a direct consequence, Oval rings enhance a cyclist’s ability to spin with a smoother power delivery and feel easier on legs while climbing. You will actually feel your pedal stroke to be more "round" with an Oval chainring than with a round chainring.Why using AbsoluteBlack oval chainrings mattersAbsolute Black oval road chainrings deliver power more smoothly to your rear wheel. This means you are better able to generate and maintain, constant cadence. Because oval chainrings reduce the peak loads on knee joints, riders using them get less stress on the joints (knees) and therefore are able to keep certain level of effort for longer. This results in higher average speed. You don’t need to take our word at Absolute Black; 11 scientific studies by leading universities around the globe show that; in comparison to round chainrings, when using oval chainrings, human legs utilize more muscle groups - but each of them to lesser degree. The overall Load from pedalling an oval chainring is spread over greater muscle mass. This has three key benefits; firstly, it gives you the feeling of fresher and more relaxed legs. Secondly; it allows you to achieve higher average speed riding uphill. Thirdly; spreading the pedalling load over more muscles reduces the risk of cramp, even when riding hard. The compound effect of switching to oval chainrings; the relaxed legs, added climbing ability and reduction of cramp means your overall enjoyment of the ride is enhanced.Why our Oval chainrings do not have adjustable timingAt Absolute Black we have extensively studied the relevant performance data regarding the optimum percentage of ovality, shape and, critically, the timing of the oval – the positioning of the high and low points of the oval, in relation to the position of the crank arm and focus this into one single mounting position – this is the really important part of what makes Absolute Black Oval chainrings so effective. By simplifying our oval chainring design, to reflect a single high performance ‘sweet-spot’, we are able to make the process of fitting Absolute Black oval chainrings faster and easier, as well as making our rings even lighter.
Designed to fit Shimano Ultegra R8000 cranksets, the absoluteBlack Ultegra R8000 Chainring Bolts & Covers provide a smooth, factory look when using aftermarket chainrings. Covering the small step between the chainring and crank arms, the covers help to restore the factory look of the crankset and are constructed from lightweight and durable 7075 T6 aluminium and have a high quality anodised finish. Includes 4 covers and 4 x T30 torx bolts.
Designed to fit Shimano Ultegra 6800 cranksets, the absoluteBlack Ultegra 6800 Chainring Bolts & Covers provide a smooth, factory look when using aftermarket chainrings. Covering the small step between the chainring and crank arms, the covers help to restore the factory look of the crankset and are constructed from lightweight and durable 7075 T6 aluminium and have a high quality anodised finish. Includes 4 covers and 4 x T30 torx bolts.
Absoluteblack premium bolt covers are designed specifically for Shimano 110/4bcd Dura-Ace 9000 cranks.Simply put, these bolt covers for DuraAce cranks make your crank look even better with AbsoluteBlack or Rotor Oval chainrings. When you switch to Absoluteblack oval rings, you create a small step down at the connection point between crank arms and chainring bolt hole area.These bolt covers fix this making your crank look great again.Weight: 13g