Originally Posted by
mconlonx
It shouldn't make a difference, but if I was swapping from Ultegra to similar quality mtn component, I'd go with XT 7xx series FD. The 443 FD you describe does actually sound like it's defective, but some of the newer Shimano stuff in the past couple of years has been slightly more particular about setup. I'd swap out another mtn derailleur as part of diagnostics, Deore or SLX if you don't actually want to go all the way to XT level component.
I have a 52 tooth big ring was told here that this(443) was correct for application . I have a bunch of XT FD' s just none with braze on mount. Too small anyway ( 48 tooth max ) this bike is a Lemond carbon / Ti Victoire with Full Ultegra groupe 52/42/32
thinking defective ,along with an XT freehub wheel I bought in 08, their quality is slipping
easy fix is go bar end shifters and original FD , only money; (
thanks for your input