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@Calben
My single speed chainring/chainset does not go round in a round motion. It has a wobble and also makes a clunk under pressure. When I pedal backwards there is a distinct section of the cog which tightens the chain and resists turning. Any ideas what this could possibly be?
I have taken the chainring of the crankset and checked that it is flat and it would appear so. Maybe very minimally not flat. I have also tried different bottom brackets and the same thing happens...help would be much appreciated and thought the experts on here might know what is happening. I wouldn't mind an excuse to buy a new crankset!