The Alter lockring is machined from 7mm thick 7075 T6 aluminum and installs using a Shimano/Sram 16-notch outboard bearing bottom bracket tool (like the Park BBT-9).

For use with cogs 14t and larger and fits any track hub with English lockring threading.

 

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

Specifications

• 7075 AL construction

• 1.29 x 24tpi left-hand English-threaded

• compatible with cogs 14t and larger

• colors: black, silver, gold, pink, green, purple

• weight: 12g