Hello, I'm riding a single gear/fixed gear bike.
When I'm on a fixed gear pedaling, my chain seems to be twitching? in some parts of the pedal,
also when I flip for a single, and pedal, the chain does not seem to be a doing perfect motion, but a bit of going up and down by not much.
I don't know if I explained it clear enough, but any help would be very appreciated.
Thank you so much.