This is Hope's Fatsno Pro 4 Disc Rear Hub.
- A direct development from the Pro 2 EVO hubs with stainless bearings throughout
- CNC 2014-T6 aluminum shell construction with (5) stainless, sealed cartridge bearings
- 44 tooth ratchet mechanism gives a 10% quicker engagement over the Pro 2 EVO
- 6-bolt/44mm-BCD International-Standard disc mounting dimensions
Freewheel: Sram XD driver
Note: Sram XD drivers are only compatible with XD cassettes, not XDR cassettes.