Please excuse my very plane english. I need your advise because in France
Sturmey Archer internal gear hubs are totally unknown.
I just restored an old Sparta bicycle with a Sturmey Archer AB (drum brake version) gear hub from 1984. The Hub does something very strange that is driving me nuts:
- On every pedal revolution, the left pedal is falling a bit to quick like there is no resistance inside the hub for an half second. It's like something slips inside the hub. The problem occurs a every speed position, always at the same pedal position. Even with a fine cable tuning, the problem stills. I can minimize it by searching the perfect cable tension but the problem stills anyway.
I've also noticed that the problem disappears on big efforts for example: riding a bridge, or an hill.
Thanks to Youtube videos, I took apart the hub 3 times to control the planet pinions, clutch, etc. I put every thing together, clean and lubricate.
But I just can't get rid of this problem.
Can someone help me ?