SRAM RED AXS Power Meter Crankset - 170mm 2x 12-Speed 50/37t 8-Bolt Direct Mount DUB Spindle Interface Natural Carbon E129 g lighter than previous generation Power meter is fully integrated into the chainring 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 X Range gearing technology gives you more range and a smoother gear progression, so youre always in the right gear Crisp and accurate front shifts DUB bottom bracket adds durability and simplicity SRAM Model