* Optimized layup drops further grams from the hollow carbon arms* X-Range gearing minimizes cadence change during a front shift* One-piece 2x chainring results in a lighter weight, stiffer, more durable crankset* 29 g lighter than the previous generation* Crisp and accurate front shifts* Ultra-light hollow carbon fiber crankarms* DUB bottom bracket adds durability and simplicity* Can be upgraded to a power meter* SRAM Model ID: FC-RED-E1