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@farewell
I have play in my gxp bottom bracket (on the track bike) which can only be felt when the drive side crank arm is forward and in line with the chain stays.
I can also feel and hear a clicking sound when I push down on the drive side pedal when riding. I assume this is the chainring moving (due to the bb play) and throwing the chain line out as the chain goes over the teeth .
Evans checked the crank arms with a torque wrench. They said its either the axle or an ovalised bottom bracket.
Does this seem possible? I can't really see how the axle could be damaged.