Sram rival 22 gxp 11sp road double chainsetenjoy exceptional performance with sram's rival 22 road double chainset. Designed with road cycling in mind, this 11 speed chainset provides the tools and technology to challenge and expand your limits on the tarmac. Sram delivers high quality components that inspire confidence and unrivalled performance. Featuresarm material forged aluminium arms, machined alloy spiderchainring material machined alloy ringsrecommended chain pc x1crank arm length 170mm, 172.5mm, 175mmspeed 11 speedchainline 45mmchainring bolt circle diameter 110chainring sizeis bottom bracket included noare chainrings included yesweight 857g 172.5mm 52x36 without bottom bracketpart no fc riv 2x11 a1technologiesgxpreg gxps gutter seal design cuts friction and weightmdashimproving both feel and performance.x glider chainrings the chainrings are designed for an optimised shifting performance with the yaw front derailleur. The stiffer rings 5mm 7075 t6 aluminium cnc machined feature upshift rivets with an advanced design adopted from sram xx. Cnc machining allows for precision control of each tooth shape, ramp, and nearly every shifting feature of the chainring. Chainrings, chain, and front derailleur are designed as a single integrated system for optimized performance.please note this is just the chainset that is supplied, not the entire groupset.buy sram components from chain reaction cycles, the world's largest online bike store.