Originally Posted by
Al1943
Triple middle rings have ramps and pins to assist lifting the chain from the granny gear.
Compare the width of the derailleur across the inside of the rails. The difference in chain width may be a problem.
There have been inconsistent reports on how well a 10-speed triple front derailleur works with a 10-speed drive train.
You could always try it and see.
I think the 9-speed triple FD is more forgiving to incompatibilities. If the 10-speed triple FD doesn't work well try to find a Shimano 9-speed braze-on type FD, Ultegra, 105, or Tiagra should work.
So, by inference, the 50t big ring would not have much of a difference, but the middle is more significant. I've got a 9 speed in the back--how does this help or hurt?
Last edited by musterion; 01-08-11 at 02:06 PM.
Reason: bad english, spelling