I am going crazy here. I have a SA SRF3 mounted on a 16 inch wheel Dahon bike I bought second hand. The bike needed some love and I managed to put it to my liking. Unfortunately I reached a dead end with the SA hub. I am on my 50th attempt of setting up the the damn thing, I looked at countless online manuals and tip and tricks. There’s no way to know I have the right tension on the chain as I pull on it to the max and never see the start of the indicator rod, is it possible it’s too short? Or is there another way to adjust it? I am willing to buy an indicator rod but how to know the right length?
Thank you in advance for any help you can provide me
It is correctly adjusted when the cable is quite taut (Plays a note when plucked) in the lowest gear and really quite slack in the highest gear. Your 1:1 middle ratio should then be in correct adjustment.
Replacement indicator rods are cheap but provided you can get your lowest gear, you shouldn’t need one.
Sturmey Archer S-RF3
3 Speed internal gear hub without brake (freewheel)
175mm axle length
Classic 3 speed gear ratio of 177%
Hub Shell Material: 6061 Aluminium
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: 36H
Pitch Circle Diameter: 67mm
Center to Flange Right: 28.6mm
Center to Flange Left: 28.0mm
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
Overall Range: 177%
Gear 1: 75% (-)25%
Gear 2: 100% Direct Drive (Gear 1 + 33%)
Gear 3: 133% (+)33% (Gear 2 + 33%)
Includes SL-S30 3 Speed Thumbshifter and 1/8 Inch 18T Dished Sprocket.