Surly Single Cassette Cog 3/32" Splined 21t MFPN=5100-58432 optional GoPro mount compatibility

optional GoPro mount compatibility

Polycolon lining

5" Fat Designed for ebike Yes External Adjustments Rebound Damping Defined Color Black Positive Spring Air Stanchion Diameter 34 Steerer Tube Length (mm) 251

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Surly Single Cassette Cog 3/32" Splined 21t MFPN=5100-58432 optional GoPro mount compatibilitySurly 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 21 Cassette Body Type Shimano HG 7 Speed Drivetrain Speeds Single Speed 3 32" Material Steel