Cogs/sprockets

Cassette Spacer 4.5mm Fits 7-speed cassettes on 8/9-speed freehub bodies.

Spacers for cobbling together or converting your old cassettes.

Problem Solvers Singlespeed Cog/Carrier 17-tooth fits Shimano-splined Freehub Bodies

Our Casettte Cog Carrier (CCC) is Shimano-splined, and sandwiches a spline-less cog. This gives you a wide profile that won’t damage your freehub, and inexpensive replacement cogs. But wait, are you sitting down? The cogs themselves have a 6-bolt hole pattern, just like disc rotors, so you can attach them to hubs with disc rotor mounts for fixed-gear use.

- 6-bolt pattern on cog fits rotor mounts for fixed gear use!
- Wide-profile alloy cog carrier
- 6-bolt compatible chromoly cog
- 3/32" compatible

Surly Single-Speed Kit, Spacers and Lockring

We now offer a single-speed spacer kit that allows you to use single-speed cassette cogs on the freehub body of your multi-speed Shimano cassette-compatible hub.

With the supplied selection of anodized aluminum spacers, you can attain a perfect chainline to compliment your road, track, or mountain crankset. Our large-diameter stainless steel cassette lockring holds everything together and perfectly matches the outside diameter of the spacers. Plus, it matches the machined shoulder of our single-speed cassette cogs (not included). The lockring is machined to utilize a common Shimano cassette lockring tool for installation and removal.

Surly Stainless Steel Track Cog Lockring 1.29" x 24 tpi Left-hand Thread

CNC-machined from premium stainless steel...no flaking chrome or rusting. We’ve improved the design to increase thread contact. It’s now a full 5mm thick, plus a lip (.65mm extra) to maximize thread contact on all compatible hubs. Fits English lockring threads (1.29x24tpi LH) to work on almost all track hubs available today except Campagnolo (1.32x24t LH) and French (33x1mm LH).