Hi,
I've been trying to put together an MTB from scratch and have got it all
going fine except the front derailleur (Shimano Deore FD-M510) which I am
trying to use with a Shimano FC-TY33 chainwheel. The derailleur instructions
recommend a chainwheel teeth combination of 44-32-22 but the FC-TY33 has
48-38-28. The derailleur instructions also advise a front chainwheel tooth
difference of 22 and a min difference between top and intermediate rings of
12 teeth. Does anyone know if this difference is sufficient to cause
problems? (Both were sold to me by my LBS together).
The problems I've been having are:
1) I had to raise the front derailleur so the outer plater was well over 5mm
above the outer chainring as otherwise the inner plate would catch the
middle chain ring.
2) Although the chain shifts reliably, I just can't get the cable tension
adjusted properly to prevent rubbing between the plates and chainrings in
the lowest and highest gear combinations.
I tried following Shimano's instructions, Sheldon's and Park Tools all to
the letter. In desparation I've left the bike at the LBS to be looked at,
but am concerned there may still be a problem of compatibility that will be
forever giving me problems in the future.
Thanks for any help!
Jerry