The handlebar diameter is fine. You crank down on the clamp bolt and the metal just wimps out and bends. You get it tight today, and then shift it a few times over a couple weeks of use, and the metal has bent enough that it's loose again.
There is a friction adjustment but it is not strong enough. You try to tighten the d-ring and the D-ring breaks off. I cranked on it with a phillips screwdriver and still couldn't get it tight enough. It's possible I bottomed out the screw and could go tighter with a shorter screw, but I didn't bother trying that. My wife will like index shifting anyway. On Mar 10, 12:02 pm, Steve Palincsar <palin...@his.com> wrote: > On Thu, 2011-03-10 at 11:44 -0800, William wrote: > > There were two things I disliked about the SunRace thumbshifters on my > > wife's Yves Gomez > > > 1. Can't get the clamp tight enough. On CroMo Alba bars, they slip > > and slide. Maybe with Aluminum bars they could dig in and hold. the > > wimpy steel clamp just doesn't hold well > > Isn't there a problem with the handlebar diameter? > > > 2. The friction force is not strong enough for some derailers. The > > left shifter couldn't hold a Suntour X-1 derailer in place. The > > derailer would gradually drift down to the small chainring. No > > quantity of tightening got it to hold. I had to switch front > > derailers to an old SRAM with a linear spring, which happened to be > > weak enough that the shifter could hold it. > > Is there a friction adjustment? A screw or D-ring to crank down? -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
