Hello, any friction experts out there?
I am restoring a touring bike from 1985 (Trek 720) and am having some issues with the derailleur and crank. The derailleur is a Simplex Pro LJ touring model, with a Velo Orange Grand Cru 50.4BCD (basically a TA reproduction).
When at the highest gear, the derailleur cage hits the crank arm. It appears to be vertically-angled as well as bowed, and I am curious if that is normal for this derailleur, or if some expert adjustments are in call. The bottom of the cage protrudes out significantly more than the front.
If i limit the high adjustment any more in front, i get grinding when I am at the highest gear. I love both these components and hope to make them work, but if it just isn't going to work, I am more interested in hanging on to the crank than the derailleur if it comes down to that. The original crank on this bike was a Sugino triple. Now it is a double. I don't know if that makes a difference.
Thanks for any advice,
Court
Link to crankset:
http://store.velo-orange.com/index.php/components/cranksets/cranks/grand-cru-50-4bcd-crankset.html
I am restoring a touring bike from 1985 (Trek 720) and am having some issues with the derailleur and crank. The derailleur is a Simplex Pro LJ touring model, with a Velo Orange Grand Cru 50.4BCD (basically a TA reproduction).
When at the highest gear, the derailleur cage hits the crank arm. It appears to be vertically-angled as well as bowed, and I am curious if that is normal for this derailleur, or if some expert adjustments are in call. The bottom of the cage protrudes out significantly more than the front.
If i limit the high adjustment any more in front, i get grinding when I am at the highest gear. I love both these components and hope to make them work, but if it just isn't going to work, I am more interested in hanging on to the crank than the derailleur if it comes down to that. The original crank on this bike was a Sugino triple. Now it is a double. I don't know if that makes a difference.
Thanks for any advice,
Court
Link to crankset:
http://store.velo-orange.com/index.php/components/cranksets/cranks/grand-cru-50-4bcd-crankset.html