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.
Does a mechanical advantage of increased gearing sound Interesting? If so read on. Through research and testing of many different prototypes with varying amounts of Ovality we found 115% (from the top centre) to be the optimum. This shrank the dead spot suitably and gave the same flawless chain retention and silence as our round rings. The shortening of the dead spot on the top and bottom of the power curve allows you to get back into the power phase of your crank rotation sooner.
Blackspire SRAM Snaggletooth NarWide Oval ChainringThis SRAM Snaggletooth NarWide Oval Chainring from BlackSpire puts a stop to chain drops, increasing your drivetrain performance. Enabling exceptional output for more controlled and smooth rotations with every pedal. Linear Power Output, Superior TractionThe reality is that the power going to your rear wheel will be linear, making traction consistent, in turn making it less likely to lose power or spin your wheel on hard climbs by avoiding the dead spot in your pedal rotation.Direct Mount DesignSince your front derailleur and chain guide are no longer needed, taking them off your bike will deliver weight savings. Blackspire has taken this a step further by making the new Snaggletooth chainring compatible with the SRAM Direct Mount system, eliminating the need to use a chainring spider; once again, shaving even more weight.Features: Material: CNC 7075-T6 Aluminium Chainring Thickness: 0.313" Offset: 6mm Ovality: 12-13% with timing of 115º after Top Dead Centre (TDC) Compatibility: SRAM GXP cranks with removable spider Drivetrain Speed: 9, 10, 11, 12-Speed Tooth Profile: Narrow/Wide Weight: 227gBuy Blackspire Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Blackspire Snaggletooth Oval Shimano ChainringDesigned with Mountain Bike (MTB) riding in mind, this Oval Shimano Chainring from Blackspire benefits from exceptional torque output and control, no matter what challenges the terrain may bring. Made from durable and lightweight CNC-machined aluminium for exceptional strength, without adding unnecessary weight to your bike.Features:Material: CNC-machined 7075-T6 AluminiumUse: Mountain Bike (MTB)Mount: Direct mountShape: OvalCompatibility: Designed for use with Shimano XT M8000 CranksBuy Blackspire Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Shimano TL-FC38 Adaptor Removal ToolThis Shimano tool is required for the installation and removal of the O-Ring holder and chainring on the Shimano Steps chainring (SM-CRE60). This adaptor removal tool is designed to be used in conjunction with the Shimano TL-FC36, TL-FC33, or TL-FC32 tools and will provide precise and accurate tooling. It is constructed from hardened steel for durability and to provide a solid engagement when working on your Shimano drivetrain.Features: Genuine Shimano High-Quality Workshop Tool For installation and removal of O-ring holder and chainring SM-CRE60 (SHIMANO STEPS) Shimano Part No.: YEZY00010Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Blackspire Snaggletooth NW Oval Chainring XT M8000When you’re attacking the trails hard, the XT M8000 compatible Snaggletooth NW Oval Chainring from Blackspire delivers reliable chain grip and consistent performance. Even over tough tree root sections and rock gardens, it makes the most of your mountain bike's (MTB's) 1x drivetrain so you get up to speed quickly and climb efficiently.Highly Efficient Oval-Shaped ChainringConstructed from CNC'd 7075 T-6 aluminum for low weight and high durability, this strong and irregular-shaped chainring is specifically built to be used with Shimano's XT M8000 cranks. When working in tandem with modern clutch derailleurs, the possibility of chain drops is removed, making for a strong and confidence-inspiring ride. Features: Material: CNC Machined 7075 T-6 Aluminium Finish: Anodised black Compatibility: Shimano Deore 5100/6000, XT M8000, XTR M9000 cranksets Speed: 1x9, 10, 11, or 12-Speed drivetrains Bolt Circle Diameter (BCD): 4x96mm (Shimano-specific asymetric) Chainring Type: Narrow/Wide oval chainring Ovality Dimensions: 12-13% with a Timing of 115º after TDC (Top Dead Centre) Weight: 226g (32T)Buy Blackspire Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Hope Oval Retainer MTB Chain RingHope's Oval Retainer Ring helps to smooth out your pedalling action and make those extended climbs to the top of the trails less painful. Also, when you're on the way back down again, you'll enjoy excellent chain retention thanks to its narrow/wide tooth profile. When used along with a clutch style rear mech, you don't need a chainguide, so overall weight is reduced and your drivetrain runs quieter and with less drag.The Oval Retainer chainring is CNC machined from 7075-T6 aluminium and provides the perfect blend of low weight and strength. It's compatible with 9, 10, and 11-Speed set ups and has a hard anodised finish, which makes it ultra durable.Features: Material: CNC machined 7075-T6 Aluminium Bolt Circle (BCD): 104mm 4 bolt pattern 12% Ovality and 113 degree clocking Narrow/wide tooth profile means no need to run a chain device Designed to work with conventional 9, 10 or 11-Speed set ups Weight: From 41g (32T)Buy Hope Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Rotor Q-Ring Oval ChainringDesigned to be used alongside your Rotor ALDHU 3D+ or Shimano 4-bolt cranks, this Oval Chainring from Rotor is made from durable, hard-wearing CNC-machined 7075 aluminium and features an enhanced torque for long-lasting performance you count on.Material: CNC-machined 7075 AluminiumCompatibility: Rotor ALDHU 3D+, Shimano 4-bolt cranksBolt Circle Diameter: 110mmUse: RoadSpeed: 10/11 speedBuy Rotor Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
The Hope Oval Spiderless Boost Retainer Ring is a neat, lightweight direct mount retainer ring option for your Hope chainset. This retainer ring features a narrow/wide tooth profile holds your chain tight and eliminates the possibility of the chain dropping when using a modern clutch rear derailleur. With an oval chainring, the power output is balanced and you will actually feel power being applied at all stages of the pedal rotation. The oval chainring design is effective because the rider does not produce an even power output with a normal circle chainring. When using a standard circle chainring, the power consistency is only relative when the rider’s feet are pushing downwards. Technologies: - Narrow/wide tooth profile designed to retain the chain without the need for a chain device. - Direct mount retainer ring designed specifically for Hope cranksets. - Saves weight without the need for a separate spider. - Able to run a broader range of smaller chainring sizes. - Quieter drivetrain and less drag. - Ultra-durable and increases longevity.
The TL-FC38 from Shimano has been constructed from hardened steel for durability and to provide a solid engagement when working on your Shimano drivetrain. The Shimano tool is needed for the installation and removal of the O-Ring holder and chainring on the Shimano Steps chainring (SM-CRE60). This adapter removal tool has been specially designed to be used in conjunction with the Shimano TL-FC36, TL-FC33, or TL-FC32 tools and will provide precise and accurate tooling.
Features:Tough genuine Shimano toolsHardened steel for longevity and durability.
Rotor Q-Ring Oval ChainringDesigned to be used alongside your Rotor ALDHU 3D+ or Shimano 4-bolt cranks, this Oval Chainring from Rotor is made from durable, hard-wearing CNC-machined 7075 aluminium and features an enhanced torque for long-lasting performance you count on.Material: CNC-machined 7075 AluminiumCompatibility: Rotor ALDHU 3D+, Shimano 4-bolt cranksBolt Circle Diameter: 110mmUse: RoadSpeed: 10/11 speedBuy Rotor Components from Chain Reaction Cycles, the World's Largest Online Bike Store.