10 Speed Wide Ratio Cassette Cogs 11-42T: 11-13-15-17-21-24-28-32-36-42T
Perfect replacement suitable for road bikes, mountain bikes. Compatible with many brands system
Cog Material: Nickel-plated, Carrier Material: High Tensile Steel
About the shifting performance, we designed our tooth profile dedicatedly and use a narrow-wide tooth design to avoid the chain drop when back-pedaling.
Close ratio gearing allows a more efficient use of energy through finer cadence control,easy to install without rear derailluer modification