- Sturmey-Archer S-RF3 internally geared hub
- 36h
- 6061 aluminum box section rim with machined sidewalls
- 18T cog included
- Shifters sold separately

Additional hub specs:
- 3 Speed internal gear hub without brake (freewheel)
- Available with 175mm axle length
- Classic 3 speed gear ratio of 177%
- Hub Shell Material - 6061 Aluminum
- Axle Diameter - 13/32” Slotted
- Axle Length - 175.0mm
- Over Locknut Dimension - 127mm
- Right Axle Protrusion Length - 24mm
- Left Axle Protrusion Length - 24mm
- Spoke Holes - 36
- Pitch Circle Diameter - 67mm
- Flange Width - 53mm
- Spoke Compatibility - 13g or 14g
- Sprocket Teeth - 13T through 22T
- Chain Line: 1/8” Flat 43.1mm
- Chain Line: 1/8” Dished 41.5mm, 44.9mm
- Chain Line: 3/32” Flat 42.7mm, 43.5mm
- Chain Line: 3/32” Dished 41mm, 45mm
- Indicator Chain - HSA420 Mark 5
- Weight - 1060g
Gear Ratio
- Overall Range - 177%
- Gear 1 - 75% (-)25%
- Gear 2 - 100% Direct Drive (Gear 1 + 33%)
- Gear 3 - 133% (+)33.3% (Gear 2 + 33%)