- Threaded on both sides to accept BMX freehweels with English threads (1.37 x 24 tpi)
- Bolt on axles , MTB
- Adjustable, sealed, full-compliment angular-contact bearings; same 7901 bearings used front and rear
- Standard, easily-replaceable, non-proprietary, CroMoly axles
- Surly New single-speed rear mountain hub
