This is a SE Racing replacement rear axle for Fat Ripper hubs. The threads are 3/8" x 26tpi. The axle is 225mm long and constructed of chromoly steel. The shoulder width is approx. 97.5mm, and it works with cartridge bearings that have a 12mm ID.
This is intended to fit the SE Fat Ripper rear hubs.This may work with some other hubs, but you must measure your old axle to make sure.
