Join Date: Jul 2008
Location: SF Bay Area
Bikes: Dahon '08 Mu P8, Litespeed Arenberg
It sounds like you need to tighten the allen screw on the back of the bar end. Neither the grips or the bar end should move at all while riding. As far as the angle is concerned, I leave mine somewhere between vertical and 45 degrees. In all honestly though, I find that the grips themselves are quite comfortable even on 25+ mile rides. I occasionally use the bar ends to change hand positions every once in a while but spend most of the time on the grip part. With all that being said, I think the best thing to do is to carry an allen wrench with you while riding and adjust the angle of the grips and bar ends until you find the position that is most comfortable to you.