FH CASS BOX THREE PRIME 9 12-50 E-BIKE BK 9s

The Box Three E-Bike Cassette offers high gears with more teeth to withstand the rigors of modern E-Bike riding

E-Bike optimized, steel cog and spider construction for improved durability

Ultra-wide ratio with consistent progression

Compatible with HG freehub bodies

Intended for use with Box Prime 9 drivetrains only - may not be compatible with other 9 speed drivetrains