Hi, My bike is suffering from BB Flexing. If you dont know what that is, it is when pedal hard and you shift to the higher gears (5, 6, 7 etc.) the higher gears sound like theyre groaning and they tend to "chirp". I just wanted to know how to fix this "BB Flexing" problem.
P.S. My bike is a GT Avalanche 3.0, if that makes any difference.