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Old 03-28-08, 10:37 PM   #1
mrt10x
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unwanted shifting

So I finally got my 85 Pinarello put together... all 1st gen C Record. Took it out for the first ride yesterday, and every time I stood up and hammered my rear dérailleur would begin to shift into smaller cogs... ever 2nd or 3rd pedal stroke. Just cable stretch?? or something else?
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Old 03-29-08, 02:38 AM   #2
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If Friction Shifters, are they too loose?

If they are downtube, there should be a screw or wing nut on the side, tighten this, and it should be OK
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i jam my thumbs up and back into the tubes. this way i can point my fingers straight out in front to split the wind and attain an even more aero profile, and the usual fixed gear - zen - connectedness feeling through the drivetrain is multiplied ten fold because my thumbs become one with the tubing.
A group for all Dawes Galaxy owners to give and recieve information about them
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Old 03-29-08, 03:36 AM   #3
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Yah.. downtube shifters.. I wondered if this could be it.. I just didnt understand why it would shift the way it was... I will check.
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Old 03-29-08, 04:01 AM   #4
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Oh yeah, just remembered this article from Shledon's site:

http://www.sheldonbrown.com/autoshift.html
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i jam my thumbs up and back into the tubes. this way i can point my fingers straight out in front to split the wind and attain an even more aero profile, and the usual fixed gear - zen - connectedness feeling through the drivetrain is multiplied ten fold because my thumbs become one with the tubing.
A group for all Dawes Galaxy owners to give and recieve information about them
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Old 03-29-08, 04:21 AM   #5
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Yah.. downtube shifters.. I wondered if this could be it.. I just didnt understand why it would shift the way it was... I will check.
You've got it.

You need to tighten down the bolt that threads into the braze-on and attaches the shifter to the frame. Should take all of 30 seconds.
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Old 03-29-08, 08:12 AM   #6
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You've got it.

You need to tighten down the bolt that threads into the braze-on and attaches the shifter to the frame. Should take all of 30 seconds.
Since they are Campy shifters, plan on tightening this bolt fairly often. These thing have a long-term reputation for losing their adjustment and allowing the "ghost shifting" you are experiencing.

I had a set of Record friction shifters on one bike years ago and had to retighten them about every three weeks to prevent unwanted shifts. I replaced them with Sun Tour Cyclone shifters and the problem never came back.
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Old 03-29-08, 12:02 PM   #7
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I guess I have read that before... and that the Sun Tours had a better reputation for staying put. Thanks for the help.. I am glad no one said, bent frame,,,frame flex,,, etc.
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Old 03-29-08, 12:04 PM   #8
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Well crap.. now Sheldon (RIP) has said the dreaded "flex" word... it is an SLX frame and I do weigh 185lbs... wonder if I am flexing it.
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Old 03-29-08, 05:32 PM   #9
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Well crap.. now Sheldon (RIP) has said the dreaded "flex" word... it is an SLX frame and I do weigh 185lbs... wonder if I am flexing it.
SLX? I doubt you're not flexing it so much that that's causing the ghost shifts.

Try Loctite 222 on the threads of the fixing bolt.
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Old 03-29-08, 11:03 PM   #10
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Yeah.. Columbus SLX.. right?? I guess I just heard that some of the 80's light tubing could be a bit flexy for "heavier" riders.
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Old 03-29-08, 11:14 PM   #11
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Per Sheldon, clean, and try a little dry lube on the cable where it goes through the guide on the underside of the bottom bracket. Frame flexing alone shouldn't cause a shift, but the friction at this point can result in the flexing "walking" the cable against the friction of the shifter.
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Old 03-30-08, 02:28 AM   #12
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would old cables contribute? I have no idea how long these cables have been in use.
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