Miche 14T Track Cog
Miche Pista steel track cogs are splined to match a carrier that threads onto a standard track hub. This system reduces damage to the hub threads from the threading and unthreading normally required with track use. This may sound a little complicated, but the sprocket can be changed without having to undo anything but the lock ring—no need to loosen and tighten the sprocket from the hub and no chance to get the threading wrong.
Cogs are available in 14-18 tooth counts in 1/8" chain widths and use a standard English 1.29 x 24 tpi threaded lock ring. Derailleur-style chains have a nominal internal width of 3/32" and single-speed bikes, including most track bicycles, use a wider 1/8" chain.