The Force 22 crankset delivers an upgrade in performance by utilizing unidirectional carbon in the crank arm matched to a forged alloy spider. &,  like RED®,  the hidden bolt pattern makes better use of carbon fiber to further improve stiffness & shed weight. The stunning X-Glide R™ chainrings are optimized for use with the Yaw technology in the front derailleur,  delivering seamless,  flawless performance. It comes in full size & compact ratios & in multiple crank arm lengths. 
 Features: Hidden bolt pattern leverages the characteristics of carbon fiber while presenting a sleek appearance. Stiffer X-Glide R chainrings feature thicker construction,  & advanced shift timing pins & ramps,  which are optimized for shifting with the Yaw™ front derailleur. Available ratios: 53/39,  52/36,  50/34,  46/36 Available arm lengths: 165mm,  170mm,  172.5mm,  175mm,  177.5mm X-Glide R Chainrings The chainrings are designed for an optimized shifting performance with the Yaw front derailleur. The stiffer rings (5mm 7075-T6 aluminum CNC-machined) feature upshift rivets with an advanced design adopted from SRAM XX. CNC machining allows for precision control of each tooth shape,  ramp,  & nearly every shifting feature of the chainring. Chainrings,  chain,  & front derailleur are designed as a single integrated system for optimized performance. Specifications: Arm 
 Material: Carbon,  Machined alloy spider Chainring 
 Material: Machined alloy Weight: 697g (BB30 172.5mm 53x 39 BB not included),  715g (GXP 172.5mm 53x 39 BB not included) Available Arm Lengths: 165mm,  170mm,  172.5mm,  175mm,  177.5mm Available Ratios: 53/39,  52/36,  50/34,  46/36 Compatibility: SRAM RED® 22 & Force 22 Yaw™ Front Derailleurs,  SRAM RED® 22 & PC1170 chains Technology Highlight (S): Carbon Fiber Arms/ X-Glide R chanirings/ Hidden bolt configuration