if you check out the picture... At the bar end, the weight has no impact on the rubber mounting of the outer sleeve, it never touches it. on the inner end the torx bolt shouldn't make any difference to vibration issues. But it does on mine and they don't come out the factory tight. But they should.
I'm in the middle of extending my bars as they are pathetically narrow and no one makes anything wider. Having tried to remove the 15mm solid steel bar from the alloy bar hub / housing, I have been unsuccessful... it doesn't move, but I think I get why some have issues with vibration.
As per most BMs the grips are held on the bike by a bolt that goes through the handlebar. On the GT this hole is 7mm (or 8 not measured it) and the small bolt is designed to float never touching the inner bar. But I suspect the tolerances are not correct and grip retaining bolt fouls on the inner bar defeating the vibration resistance.
Last edited by botus; Oct 14th, 2018 at 7:00 am.