machined from hardened cro-mo steel, the Fumikiri track lockring has a black phosphate finish and installs using a Shimano/Sram 16-notch outboard bearing bottom bracket tool (like the Park BBT-9).

For use with cogs 13t and larger.

Not compatible with Campagnolo, Miche, Phil Wood, Mack or Mavic hubs.

Specifications

made in Japan

standard 1.29″x24 tpi left-hand threads