The most advanced, Patent Pending narrow/wide tooth profile on the Market guarantee minimum 12 months of excellent chain retention capabilities! We mean it. You can finally take your chainkeeper off of the bike. Tested by XC Silver World Champion Marek Konwa. Used by World Champion - Maja Wloszczowska!
Round chainring designed for Shimano and other 64BCD cranks.
Size (Mass +/-1g): 64BCD: 26T (34g), 28T (40g), 30T (44g)
Color: Black, Racing Red
Compatibility: All cranks with 4x 64BCD interface. That means Shimano, Sram, Race Face, FSA, etc
Material: cnc machined 7075 Txxx Aluminum. Long-lasting construction
Finish: type II anodizing
Mounting holes: 4 x 64BCD for 26/28/30T
26/28/30T - Please note this size is in 64BCD! It provides a lot better chainline that way (around 46mm) for using granny gears. That means no rubbing while riding uphill and less drivetrain wear. Chainline will be on 6th cog from smallest on 10spd cassette. 3X crankset users, please be mindful that 30T ring may touch chainstay if not enough space, so please check (print this size chart). 26/28T will fit to all cranks. 2X crankset users will accommodate 26/28/30T ring with easy.
The lightest alternating tooth solution on the bicycle market – period.
Word on BIOPACE
Please understand that this is not Biopace technology. Shimano created Biopace with the completely wrong orientation of the biggest radius of the oval. Instead of positioning it in power zone which is slightly below the level of the crank, they clocked it to the dead zone where human generates least power. The result was that in power zone pedaling was too easy and in dead zone very difficult. Exactly opposite to how it should be.
Other elliptical chainrings
Clocking (timing) and shape of the oval are the most crucial parts of the design. Ride quality of Absoluteblack Oval ring will be different to ovals from brand X or Y. 2 years of development of our ovals resulted in commercially most successful product of its kind. AbsoluteBlack is the First company who managed to successfully popularize ovals in mountainbike sport. Please note: Other manufacturers offer one timing and ovality setting for all chainring sizes, but pedaling behavior changes with each size considerably. To optimize for this, every chainring size needs to be a bit different. For example the smaller the chainring size the bigger the ovality has to be to help climb steeper hills more effectively. This is where we specialize in and optimize every size to particular pedaling style. This is also why we do not provide information about timing and exact ovality of the chainring as each one is different.