The SRAM Rival 1 cranksest delivers immense performance across a broad variety of bikes and disciplines. Paved or not. Cyclocross or triathlon. Road racing or unchartered journeys. Rival®1 provides a single-minded proposition to meet each challenge and expand your limits. Features: Forged aluminum arms with detachable spider X-SYNC™ chainring-an integral component of the SRAM 1x™ drivetrain X-SYNC™ tall, square tooth design provides maximum chain control Sharp, narrow tooth profile and rounded chamfer edges help manage a deflected chain Mud and debris-clearing recesses for the inner chain links and rollers