Surly Single Cassette Cog 3/32" Splined 21t Model=Mallet Headset }Profile Design Universal Gap Cap:

}Profile Design Universal Gap Cap: fits 1" or 1-1/8" steerer tubes Aluminum Top Cap Black

0 Length 293 Spoke Interface J-Bend Defined Color Silver

It offers longer wear with less friction and less noise than previous SRAM chains

S Lower EC34 Weight 142 Crown Race 30 Bearing Type Cartridge Color Black S

Surly Single Cassette Cog 3/32" Splined 21t Model=Mallet Headset }Profile Design Universal Gap Cap:Surly Single Cassette Cog 3 32" Splined 21t. Surly 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 TECH SPECS Tooth Count 21 Cassette Body Type Shimano 7 Speed Material Steel Drivetrain Speeds