Forget front derailleurs; SRAM's Rival 1 Crankset brings a game-changing upgrade in performance and reliability to cyclocross, road, and other 700c disciplines. It combines the durability, simplicity, and efficiency SRAM is know for on the road with their 1x mountain technology, X-Sync. FEATURES: 42T and 52T X-Sync tall, square tooth design provides maximum control Single-ring drivetrain simplifies function Sharp, narrow tooth profile and rounded chamfer edges help manage a deflected chain Designed for a single ring drivetrain that eliminates the mud-catching front derailleur Forged aluminum arms with detachable spider Includes alloy CNC machined X-SYNC chainring 799g (172.5mm/GXP) with 42t chainring/without BB SPECS: Speed 1x BCD 110mm Ring 42T Interface BB30 Length 172.5mm Color black