Front Derailleur problem
08-03-10, 06:28 PM
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Front Derailleur problem
Hey folks,
I can't seem to get the set-up quite right with my SRAM Rival groupset.
The gears shift fine until in the highest gear (big chainring, small cassette ring) where the chain rubs the front deraileur.
The problem I have is that the H limit screw is wound out as far as possible so I cant move the derailleur out any further to stop it rubbing.
Any advice on what I can do to solve the rubbing issue?
I can't seem to get the set-up quite right with my SRAM Rival groupset.
The gears shift fine until in the highest gear (big chainring, small cassette ring) where the chain rubs the front deraileur.
The problem I have is that the H limit screw is wound out as far as possible so I cant move the derailleur out any further to stop it rubbing.
Any advice on what I can do to solve the rubbing issue?
08-03-10, 08:25 PM
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Have you tried pulling on the derailleur with your hand, overriding the lever, to see if it still won't move out far enough not to rub?
I ran into a similar problem with a rebuild I just did; new frame, different seat tube diameter so new (Ultegra triple) derailleur. I set the height of the derailleur according to the little guide sticker on the plate, and it just wouldn't move far enough outward. As I was tugging on it with my hand, it finally moved out further, but it kinda "broke loose" in order to do so. WTF? Did I break something? Turns out that at the prescribed height, the inner plate was juuuust touching the tops of the teeth of the middle (40T) chainring. I cheated and raised the der aprx 2mm, beyond the "zone" prescribed by the guide sticker. It's not the smoothest shiftin' triple I've ever had, but it works, and no longer hits. Maybe you're running into (no pun intended) something similar?
I ran into a similar problem with a rebuild I just did; new frame, different seat tube diameter so new (Ultegra triple) derailleur. I set the height of the derailleur according to the little guide sticker on the plate, and it just wouldn't move far enough outward. As I was tugging on it with my hand, it finally moved out further, but it kinda "broke loose" in order to do so. WTF? Did I break something? Turns out that at the prescribed height, the inner plate was juuuust touching the tops of the teeth of the middle (40T) chainring. I cheated and raised the der aprx 2mm, beyond the "zone" prescribed by the guide sticker. It's not the smoothest shiftin' triple I've ever had, but it works, and no longer hits. Maybe you're running into (no pun intended) something similar?
