02-16-2010, 10:48 AM
Here's what I have: SRAM Rival shifters with FSA SL-K light carbon compact CX crankset (36/46), SRAM chain and rear cassette. I've been fiddling with the front derailleur for weeks now and can't seem to get it right. Limit screws are set fine, the chain does not jump off either side. When on the service stand, I can shift from small to big ring and back with no problems in any of the rear gears. So I think it's great. Then I put the bike on my indoor trainer and try to shift while pedaling and it's no longer so great. It shifts down just fine, but won't shift up with even moderate pedaling pressure. If I try to shift up while pedaling the chain seems to bind against the inside of the large ring and it clunks and rattles until I let all of the pressure off the pedals and just spin freely, then it shift ups in about 2 rotations. Sometimes it even sucks up the lower chain run into the derailleur cage somehow. I've tried adjusting the cable tension both directions and nothing seems to work. I have the derailleur height set so the cage is as close to the large ring as possible without touching, and the angle is parallel to the large ring as well. I'm out of ideas on what else I can adjust. Could it be a chain length issue or ?? Any ideas would be appreciated.
Jarel
2009 Voodoo Limba CX
2009 Voodoo Limba CX