Hi i was just wondering if anyone could help me... Yesterday i was riding my bike and all of a sudden i heard a quite loud bang, then before i was riding it and it didn't feel right so i put my bike upside down to see if anything was wrong and i was having a look and i found that my right crank arm would wobble and i have tried tightening it but it just wouldn't work. Please leave a reply saying what it could be n if there is a way to fix it Thanks a lot JJ