Excuse the carbon paranoia here...
Was installing a set of di2 shifters into these bars. Since the clamp mounting surface has that rough sand-paper like coating, I didn't use any carbon assembly paste.
Put everything together and start tightening the clamps. I would tighten it finger tight, and then try rotating the shifters. If they still moved, I would tighten some more - each time a tiny bit incrementally.
After not all that much torque and with the shifters still moving if I twisted them hard enough, I tighten it a bit more and I heard a "crack" sound come from the bar.
So I take everything apart, inspected with a flashlight and magnifying glass and could not find a crack or scratch on the bar. Put everything back together. Grab both sides of the bars and try to flex them as hard as I could. No creaks, no sounds. Put the front wheel between my ankles, grab the bar ends and tried twisting it from side to side. Nothing.
What does everyone suggest? Put some miles on it and see if anything turns up? Or toss them (brand new bars
) and not risk it?
How strong are these bars anyways? for those of you who have actually cracked a handlebar by overtightening the shifter clamps - how hard were you tightening them before something broke?
thanks in advance