Surly stainless steel track lock ring

Our Track Cog Lockring was designed in conjunction with our Track Cog, and as such, they go together like hamburgers and hot dogs. It’s now a full 5mm thick, plus a lip (0.65mm extra) to maximize thread contact on all compatible hubs. Fits English lockring threads (1.29” x 24tpi LH) to work on almost all track hubs available today except Campagnolo (1.32” x 24tpi LH) and French (33mm x 1mm LH). Compatible with standard ISO-threaded (1.375” x 24tpi) hubs.