Surly Single Cassette Cog 3/32" Splined 21t Model=Mallet Headset 4 ISO Width (mm) 61

4 ISO Width (mm) 61 ISO Diameter 622 / Road / 29"

Integrated guard protects spokes from derailleur interference

}RockShox Fork Service Kit Full: Yari Solo Air

}DT Swiss Pro Line Spoke Freeze - 10ml Pack of 2

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

Surly Single Cassette Cog 3/32" Splined 21t Model=Mallet Headset 4 ISO Width (mm) 61Surly 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