I can no longer shift my chain onto the larger of my two rings. I've tried to adjust the derailleur but it doesn't have enough throw to reach the larger one; no amount of adjusting the L or H screws will do the trick. The total throw is only about 1/8" inch--nowhere near enough of what is needed to move between the two rings (about 3/4" by my eye.)
There is very slight slack in the cable when it's shifted to the lower ring. The bracket does not seem to have shifted on the frame (nor do I see how this could affect total throw). I'm really confused--how can the derailleur have had enough throw previously but does not now?
No instruction pages (including sheldonbrown.com nor parktool.com) on front derailleur adjustment cover this situation of lack of sufficient throw--they all just say "shift to the larger ring" before adjusting the "H" screw, as if that's always possible.
I can no longer shift my chain onto the larger of my two rings. I've tried to adjust the derailleur but it doesn't have enough throw to reach the larger one; no amount of adjusting the L or H screws will do the trick. The total throw is only about 1/8" inch--nowhere near enough of what is needed to move between the two rings (about 3/4" by my eye.)
There is very slight slack in the cable when it's shifted to the lower ring. The bracket does not seem to have shifted on the frame (nor do I see how this could affect total throw). I'm really confused--how can the derailleur have had enough throw previously but does not now?
No instruction pages (including sheldonbrown.com nor parktool.com) on front derailleur adjustment cover this situation of lack of sufficient throw--they all just say "shift to the larger ring" before adjusting the "H" screw, as if that's always possible.
Thanks for any ideas, -Kurt
Your shift cable is too slack and needs to be tightened. The limit screws you were adjusting are only meant to prevent the derailer from going past the large and small chainrings, and dropping the chain. Your problem is that the shifter is not pulling in enough cable to extend the derailer all the way.
Both Sheldons website and the Park website have instructions to tighten the derailer cable. You will need to loosen the limit screws and readjust them, if you have already done so.
I can no longer shift my chain onto the larger of my two rings. I've tried to adjust the derailleur but it doesn't have enough throw to reach the larger one; no amount of adjusting the L or H screws will do the trick. The total throw is only about 1/8" inch--nowhere near enough of what is needed to move between the two rings (about 3/4" by my eye.)
There is very slight slack in the cable when it's shifted to the lower ring. The bracket does not seem to have shifted on the frame (nor do I see how this could affect total throw). I'm really confused--how can the derailleur have had enough throw previously but does not now?
No instruction pages (including sheldonbrown.com nor parktool.com) on front derailleur adjustment cover this situation of lack of sufficient throw--they all just say "shift to the larger ring" before adjusting the "H" screw, as if that's always possible.
Thanks for any ideas, -Kurt
Hi, can you get it to move farenough by hand? You should be able to grab a hold of it and pull it out. If it moves far enough, that way, then as the other poster suggested, it is a cable and/or shifter problem.
Besides pulling slack out of the cable, pull the cable out of the housing and look at it. It's amazing what 1-2 broken wire strands can do!
Kurt Tappe said:
I can no longer shift my chain onto the larger of my two rings. I've tried to adjust the derailleur but it doesn't have enough throw to reach the larger one; no amount of adjusting the L or H screws will do the trick. The total throw is only about 1/8" inch--nowhere near enough of what is needed to move between the two rings (about 3/4" by my eye.)
There is very slight slack in the cable when it's shifted to the lower ring. The bracket does not seem to have shifted on the frame (nor do I see how this could affect total throw). I'm really confused--how can the derailleur have had enough throw previously but does not now?
No instruction pages (including sheldonbrown.com nor parktool.com) on front derailleur adjustment cover this situation of lack of sufficient throw--they all just say "shift to the larger ring" before adjusting the "H" screw, as if that's always possible.
ktappe-<< I can no longer shift my chain onto the larger of my two rings. I've tried to adjust the derailleur but it doesn't have enough throw to reach the larger one; no amount of adjusting the L or H screws will do the trick >><BR><BR>
Something has moved your crank to the right. Is the BB coming out of the frameset?
Since you say 'no longer', did it once work?
If the BB is okay, something is amiss with inner wire, housing or shifter.
Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302 (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene"
