Halo Fix-T Freewheel Hub Thread Cover - 1.37"x24t - Black Purple ULTRA SSD OX-110/10mm ISO 6-Bolt

ULTRA SSD OX-110/10mm ISO 6-Bolt Disc Bolt-on Rear Hub

It is constructed of ultra-light 3D-forged 7075 alloy with internal oval construction

or PO boxes

It is recommended to have 245mm (+/-3) distance from center brake boss to the front of the cable stop

Halo Fix-T Freewheel Hub Thread Cover - 1.37"x24t - Black Purple ULTRA SSD OX-110/10mm ISO 6-BoltThis is a cool little doo dad. It is a cap that threads onto the large side of a flip flop hub to cover or protect the threads. It has 1. 37"x24t threads and is constructed of aluminum. This is just the cap, it is not a hub. The second photo just shows what it looks like installed.