Its the ultimate in integrated power measurement. The Force AXS power meter kit adds Quarq technology to our one-piece chainrings for the lightest, stiffest, and most accurate power package available. A 13-tooth delta on all chainring pairs ensures precise shifting for any setup, as well as a less dramatic change in cadence during front shifts. Combined with our most durable chainrings ever, its an unbeatable combination.SRAM Force AXS Groupset ReviewKey Features:X-Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gear Power meter is fully integrated into the chainring set for lighter weight Power readings are accurate within +/-1.5% and arent affected by climate conditions during a ride Measures right and left leg power balance Crisp and accurate front shifts Unique chainring shape results in a lighter weight, stiffer, more durable unit Specifications:Speeds: 12 Crank arm length: n/a BB Compatibility: n/a Chainring Size: 46