Gear ratio of 138%
Automatic version of the S2 Kick Shift hub. The A2 shifts gear automatically according to the pedal cadence. Speed of shift is controlled by the wheel RPM so the road speed at which the shift occurs will vary with wheel size. Please see second image to see approx change speed for the two models.
2 speed hub without brake (freewheel)
No shifter cable or associated wear issues

32H A2-H is available with 160mm axle & 120mm OLD

36H A2-L is available with 185mm axle & 132.5mm OLD which can be changed to 120mm OLD

Comes with Sprocket, circlip, non-turn washers and axle nuts

Hub Shell Material 6061 Aluminum

Axle Diameter 13/32 Slotted

Right Axle Protrusion Length 20mm
Left Axle Protrusion Length 20mm
Spoke Holes 32 or 36
Pitch Circle Diameter 67mm
Center to Flange Right 28.3mm
Center to Flange Left 28.3mm
Flange Width 53mm
Spoke Compatibility 13g or 14g
Sprocket Teeth 13T through 22T
Chain Line: 1/8 Flat 42.7mm
Chain Line: 1/8 Dished 40.9mm, 44.5mm
Chain Line: 3/32 Flat 42.3mm, 43.1mm
Chain Line: 3/32 Dished 40.6mm, 44.8mm