why are you clamping round the top tube? any decent bike mechanic knows this is the wrong place to clamp a bike, the tube walls (if butted) are about .4-.6mm in the middle of the top tube so easily dented.
always clamp onto the seatpost or the unbutted part of the seattube.
why are you clamping round the top tube? any decent bike mechanic knows this is the wrong place to clamp a bike, the tube walls (if butted) are about .4-.6mm in the middle of the top tube so easily dented.
always clamp onto the seatpost or the unbutted part of the seattube.