Anything under 44/16 gearing is a mystery to me so can anyone answer a couple of questions for me?
First off, drivers. Are they universal, like freewheels? Been thinking about getting a freecoaster, probably a 9t geisha light but not sure if i can run that small a gearing.
Secondly, when do sprockets get into 'micro gearing' . Micro gearing has different crank fittings right? If i change gearing now any sprocket i get will have to fit a one piece crank.
Third, so i can try and work out what chain clearance i have, can anyone tell me the overall diameter (including teeth) of a 9t and 11t driver, and the overall diameter of a 24, 28 and 30 sprocket.