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.
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.
We have lovingly crafted manufactured and tested the rings here in the UK’s best riding spots.We then gave them to elite riders such as Josh Bryceland Marc Beaumont and Scott Mears. To ensure quality chain retention at the highest speeds.We use lightweight and durable 7075 T6 aluminium to ensure maximum endurance. So that your chain stays where it is supposed too. 104 BCD Thick Thin Chainring the perfect partner for Shimano cranks. Designed to work with clutch derailleurs to keep your chain from dropping off even on the roughest of trails. Made from aerospace grade aluminium And any other cranks that use the 4 bolt 104 BCD pattern.
The perfect steel e-bike thick thin chainring for maximum chain retention and durability.Note: Fits all e-bikes with a Shimano motor.Comes in Burgtec Black 34T only.
The perfect steel e-bike thick thin chainring for maximum chain retention and durability. Note: Fits all e-bikes with a 104mm BCD spider except those with a Shimano motor. Comes in Burgtec Black only.
Only compatible with V-Shape chainrings.Forged AL6061 spider.BCD 104mm.W0134 - Chain Line (CL): 50mm, Offset: 5.2mm.W0138 - Chain Line (CL): 52mm, Offset: 8.2mm.W0140 - Chain Line (CL): 55mm, Offset: 9.9mm.
Shifting performance has helped Full Speed Ahead to become a world leader for high-end chainrings. No one studies the design and manufacturing of each system, and each tooth, as carefully as FSA do. FSA's dedication shows in every revolution of the crank, and every perfect shift achieved. To meet or exceed the needs of any drivetrain, FSA has developed sophisticated design, testing and manufacturing protocols. This allows FSA to match your needs as perfectly as their chainrings match a chain. The FSA Pro Road chainring is made from hard-wearing CNC machined AL7075 T6 alloy and it is ramped and pinned, so you get top-notch shifting quality every time. This model is compatible with Shimano 10/11-speed cranksets, giving brilliant acceleration and smooth shifts every time. Chainrings are sold individually, not as a pair.
Shifting performance has helped Full Speed Ahead to become a world leader for high-end chainrings. No one studies the design and manufacturing of each system, and each tooth, as carefully as FSA do. FSA's dedication shows in every revolution of the crank, and every perfect shift achieved. To meet or exceed the needs of any drivetrain, FSA has developed sophisticated design, testing and manufacturing protocols. This allows FSA to match your needs as perfectly as their chainrings match a chain. The FSA Pro Road chainring is made from hard-wearing CNC machined AL7075 T6 alloy and it is ramped and pinned, so you get top-notch shifting quality every time. This model is compatible with Shimano 10/11-speed cranksets, giving brilliant acceleration and smooth shifts every time. Chainrings are sold individually, not as a pair.
Shifting performance has helped Full Speed Ahead to become a world leader for high-end chainrings. No one studies the design and manufacturing of each system, and each tooth, as carefully as FSA do. FSA's dedication shows in every revolution of the crank, and every perfect shift achieved. To meet or exceed the needs of any drivetrain, FSA has developed sophisticated design, testing and manufacturing protocols. This allows FSA to match your needs as perfectly as their chainrings match a chain. The FSA Pro Road chainring is made from hard-wearing CNC machined AL7075 T6 alloy and it is ramped and pinned, so you get top-notch shifting quality every time. This model is compatible with Shimano 10/11-speed cranksets, giving brilliant acceleration and smooth shifts every time. Chainrings are sold individually, not as a pair.
Shifting performance has helped Full Speed Ahead to become a world leader for high-end chainrings. No one studies the design and manufacturing of each system, and each tooth, as carefully as FSA do. FSA's dedication shows in every revolution of the crank, and every perfect shift achieved. To meet or exceed the needs of any drivetrain, FSA has developed sophisticated design, testing and manufacturing protocols. This allows FSA to match your needs as perfectly as their chainrings match a chain. The FSA Pro Road chainring is made from hard-wearing CNC machined AL7075 T6 alloy and it is ramped and pinned, so you get top-notch shifting quality every time. This model is compatible with Shimano 10/11-speed cranksets, giving brilliant acceleration and smooth shifts every time. Chainrings are sold individually, not as a pair.
Shifting performance has helped Full Speed Ahead to become a world leader for high-end chainrings. No one studies the design and manufacturing of each system, and each tooth, as carefully as FSA do. FSA's dedication shows in every revolution of the crank, and every perfect shift achieved. To meet or exceed the needs of any drivetrain, FSA has developed sophisticated design, testing and manufacturing protocols. This allows FSA to match your needs as perfectly as their chainrings match a chain. The FSA Pro Road chainring is made from hard-wearing CNC machined AL7075 T6 alloy and it is ramped and pinned, so you get top-notch shifting quality every time. This model is compatible with Shimano 10/11-speed cranksets, giving brilliant acceleration and smooth shifts every time. Chainrings are sold individually, not as a pair.
Shifting performance has helped Full Speed Ahead to become a world leader for high-end chainrings. No one studies the design and manufacturing of each system, and each tooth, as carefully as FSA do. FSA's dedication shows in every revolution of the crank, and every perfect shift achieved. To meet or exceed the needs of any drivetrain, FSA has developed sophisticated design, testing and manufacturing protocols. This allows FSA to match your needs as perfectly as their chainrings match a chain. The FSA Pro Road chainring is made from hard-wearing CNC machined AL7075 T6 alloy and it is ramped and pinned, so you get top-notch shifting quality every time. This model is compatible with Shimano 10/11-speed cranksets, giving brilliant acceleration and smooth shifts every time. Chainrings are sold individually, not as a pair.