SRAM Red 22 Cyclo-Cross ChainsetInnovation often comes from places you would least expect. In order to make a lighter crankset, SRAM made it bigger. To add stiffness, they used less material. These features may sound like contradictions but SRAM managed to achieve them for their Red 22 Cyclo-Cross Chainset. This is due to its high-quality carbon fibre construction, which is completely hollow all the way to the spider Optimised ChainringsThis chainset also features a hidden bolt pattern, which makes better use of carbon fibre to further improve stiffness and shed weight. The stunning X Glide R™ chainrings are optimised for use with the Yaw™ technology in the front derailleur, delivering seamless, flawless performance Features: Arm Material: Carbon Chainring Material: Machined Alloy Compatibility: SRAM RED 22 & SRAM Force 22 Yaw™ front derailleur, SRAM RED 22 & PC1170 chains Bottom Bracket Type: SRAM GXP (not included) Hidden bolt pattern leverages the characteristics of carbon fibre while presenting a sleek appearanceTechnologies: 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 optimised performance Exogram: The new hollow carbon construction starts in the crank arm and extends into the crank arm's spider. It maximises the stiffness to weight ratio*Please note, Bottom Bracket is NOT included Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.