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Problem shifting from 53T to 39T chainring!
I have Dura Ace 10spd w/ 53/39 chainrings. My front derailleaur is
unable to get the chain off the 53 down to the 39. As the derailleaur shifts inward it is pinching the chain against the 53 and unable to cleanly sweep it off to the lower chainring? The chain basically gets kinked/pinched on the 53?? I just shipped the bike and obviously something got misaligned...derailleaur doesn't look bent but I am not much of a mechanic. Thanks, HC |
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#2
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On 22 Feb 2005 19:24:55 -0800, "Holden" may
have said: I have Dura Ace 10spd w/ 53/39 chainrings. My front derailleaur is unable to get the chain off the 53 down to the 39. As the derailleaur shifts inward it is pinching the chain against the 53 and unable to cleanly sweep it off to the lower chainring? The chain basically gets kinked/pinched on the 53?? I just shipped the bike and obviously something got misaligned...derailleaur doesn't look bent but I am not much of a mechanic. If the bike's transportation was via an insured method, have the lbs look at it for possible damage. I'd expect the problem to be fairly trvial, though, on the order of a cable kinked or mislocated, perhaps. I'd start by checking to see if the der cable's been knocked out of the groove in the plastic bracket on the bottom of the frame, and then inspect the rest of the cabling for things that might be out of place or kinked. If that all looks kosher, then have a trained eye look at it. Here is a place to get some hints about how it's supposed to work: http://sheldonbrown.com/derailer-adjustment.html#front -- My email address is antispammed; pull WEEDS if replying via e-mail. Typoes are not a bug, they're a feature. Words processed in a facility that contains nuts. |
#3
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Holden wrote:
I have Dura Ace 10spd w/ 53/39 chainrings. My front derailleaur is unable to get the chain off the 53 down to the 39. As the derailleaur shifts inward it is pinching the chain against the 53 and unable to cleanly sweep it off to the lower chainring? The chain basically gets kinked/pinched on the 53?? I just shipped the bike and obviously something got misaligned...derailleaur doesn't look bent but I am not much of a mechanic. Thanks, HC If you haven't had a STI system with a trim function, make sure that you're pressing the downshift lever (inner lever of the brake shifter) all the way in with two clicks instead of one. -- Phil, Squid-in-Training |
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