Originally Posted by
kevin_stevens
What is the minimum difference spec on the front derailleur? For example , on an Ultegra or 105 it's 13T. That's the tooth difference you need between middle and large wheels so that the cage bottom can clear the middle when moving over to the large.
If you don't meet the spec, you just have to move the derailleur up anyway and put up with a misadjusted top cage.
KeS
I have no idea. It is this derailleur:
http://www.sram.com/sram/mountain/pr...ont-derailleur
I can get it setup in a way where I can use both ends but can only use half of the rear gears on each cross-chain setup. No amount of tilting the derailleur one way or the other will get me any closer. I swear if the entire thing was rotated a little bit, every gear configuration would work without rubbing, but it would also be more likely to not shift properly. That's another thing - I can get it close but then shifting is a bit off and I have to use the shifter to give it a bit more movement to get up/down a gear. Perhaps it actually is defective/bent - I don't have another bike to actually bolt it onto. I could just let a LBS fight the issue
Also I should add that the BB was installed properly by a LBS. The side marked drive side is behind the chainring.
All I REALLY need is the bigger two chainrings - If only I could get all three to work well enough, I can deal with the cross chaining rear gears rubbing on the small chainring. If it was steel, I'd just bend the thing in places until it works to my liking. I just don't understand the issues though since my previous bike, which had a Shimano Altus front and currently used SRAM X9 rear managed to go into all 27 of its gears without even being close to rubbing anywhere. It used 24-34-42 chainrings though, and the same wheelset/cassette I have now.