EAI stainless steel stepped lockring

Burly track lockring machined from stainless steel and polished to a mirror finish. 5.5mm thick with a stepped design that prevents the chain from hitting the lockring when using a 12t cog. Of course, you can use this lockring with other size cogs too.   Not compatible with Campagnolo, Miche, Phil Wood, Mack or Mavic hubs. Specifications • six notches for use with any common lockring tool • 1.29"x24 tpi left-hand English threads