Sturmey Archer RX-RK5 5sp Disc Rear Hub.
- Internal gear 5-speed hub for use with any IS 6-bolt disc brake
- 6061 aluminum hub shell with 13/32" slotted solid axle (185mm overall axle length)
- Rotary gear selection with no protruding indicator chain or switch box
- Gear ratio range of 243% (25% each step)
- Includes 1/8" 3-spline cog and a TSC50 twist shifter
Axle: 13/32"x135mm nutted