Surly Track Cog 1/8'' X 15t Silver CheckoutTitle=RockShox Deluxe Ultimate RCT Rear Shock - 185 x 52.5mm Includes cables and stationary grips

Includes cables and stationary grips

The top is flat and low profile and we've used the ideal blend of stiffness/softness in the injection molded foam to allow for good support and power while pedaling

A spacer kit including four 2 mm spacers is available for purchase to further fine tune Q Factor adjustment

SC- Single compound casing for a durable dependable tire

Rear Axle 12mm Thru x 148mmCassette Body Type Shimano Micro SplineColor PurpleSkewer Included NoBearing Type Sealed CartridgeWeight 292Designed for ebike YesDefined Color PurpleSpoke Interface J-Bendkeyword search Color Pop PurpleHub Drilling 32Hub/Brake Compatibility 6-Bolt Disc

Surly Track Cog 1/8'' X 15t Silver CheckoutTitle=RockShox Deluxe Ultimate RCT Rear Shock - 185 x 52.5mm Includes cables and stationary gripsSurly track cogs are threaded the same as a BMX freewheel (1. 375 x 24 tpi right hand threads). This means that they will fit on single speed rear hubs as well as BMX freewheel hubs but this application is not recommended. Track cogs are meant to work on track hubs only. 415 hardened chromoly steel 1. 375" x 24 tpi Photo for color and material reference only Tooth Count 15 Size 1 8''