The 77designz Cassette Spacer replaces the granny gears of your 10 speed cassette and transforms it into a super pro DH Race Cassette with only 7 gears. It's mounted in no time, made out of super strong 7075 T6 Aluminium and drops the weight of your ride massive. That's just all you need for DH Racing.
- compatibility: all 9/10-speed hubs
- max. capacity: 25T