Chain rubbing on the front derailleur

[Flur]

After fiddling with it a bit more it seems like the derailleur itself might be hitting the larger chainring just slightly... Maybe the guy that put it on put it too low?? I'm going to bring it back to the shop when my regular guy is there on Tuesday and have him take a look.

[Triskeliongirl]

I can use the 50/11 or 34/11 combination on mine, actually all combinations with no problems and no trimming (50/34 in front and 11/34 in back). But I put a triple mountain FD on even though its only a double.

[Becky]

I can use the 50/11 or 34/11 combination on mine, actually all combinations with no problems and no trimming (50/34 in front and 11/34 in back). But I put a triple mountain FD on even though its only a double.

I would venture to say that the triple is what's making the difference. It probably has a wider swing. Even so, I'd be reluctant to use the 34/11 or 12 just because of the extreme chain angle. 50/11 is no problem.

I can use my 34/13 for short periods of time, but not my 34/12 (running a 12-25). It took me a lot of fussing with cable tension to get the trim click in the right place to get the maximum number of usable gears.

[Triskeliongirl]

I do avoid the most extreme positions because it reduces chain life, but my point is that by using a triple FD I can use any combo I want without rubbing and trimming, which is very nice.