Join Date: Sep 2000
Location: Spokane WA
Bikes: Seven Axiom Ti, Trek 620, Masi cylocross (steel). Masi Souleville 8spd, Fat Chance Mtn. (steel), Schwinn Triple Bar cruiser, Mazi Speciale Fix/single, Schwinn Typhoon
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Has the limit screw been adjusted properly?
Check by shifting the derailleur with your hand, directly on it. The limit screws are mounted on the parallelagram and keep the pulleys out of the spokes or from dropping the chain off the outside cog, loosen the appropriate screw until it shifts for you.
If your pulleys are not in line with you cogs when sighted from the rear, (slightly "outboard" at the bottom for campy), something is bent- either your dropout on the frame or the derailleur or both, usually fixable.
To adjust your derailleur(rd), undo the cable at the rd, screw the abjusting barrel down to bottom and turn out a bit for slack, at this point it should be resting on the outside cog, re-attatch the cable,tightly-no slack, turn the barrel back down for slack, turn your shifter one click, rotate pedals and turn adjuster until it shifts, then move the sifter up and down the gears and adjust barrel accordingly to get the best shifting through tthe range.
If you can't turn the barrel, you threads may be damaged- try a different barrel and/or "chase"(re-cut) the threads on the rd