Surly Single Cassette Cog 3/32" Splined 15t MFPN=HXCRBBKB2 Compatible models: aluminum mountain bikes

Compatible models: aluminum mountain bikes (except pre-2017 Chisel HT aluminum)

The Shimano STEPS E6000 switch unit for eBike shifting

240 hub with Ratchet EXP driver

Alkaline based and free from CFCs solvents or acids

Surly Single Cassette Cog 3/32" Splined 15t MFPN=HXCRBBKB2 Compatible models: aluminum mountain bikesSurly Single Speed Cogs. Designed as a singlespeed cog but may also be stacked and used with 9 speed shifter. Multi gear use will result in slower less crisp shifting than cogs designed for multi gear systems Fit Shimano freehub splines SCM 415 hardened chromoly steel Photo for color and material reference only Tooth Count 15 Cassette Body Type Shimano HG 7 Speed Drivetrain Speeds Single Speed 3 32" Material Steel