Shimano 12-25T 10speed
12/13/14/15/16/17/19/21/23/25
★ Shimano 10s RD compatible.
★ 10 individual 6/4 Ti cogs.
★ Mono block CNC machined AL7075 carrier.
★ Optimized tooth profile for swift shifting performance.
*Fixed mount, no user replaceable cogs*
