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Tensioning DA rear deraileur(4 posts)

Tensioning DA rear deraileurfiltersweep
Apr 14, 2003 11:10 AM
My rear deraileur seems to be loose- the idler gears seem to chatter against the chain when I go over bumps and it "autoshifts" under heavy load. I assume the spring is just out of adjustment... anyone have a quick and easy way to readjust it (I'm relatively ignorant of this issue as I've never encountered it before).

It's a good idea to keep these tight.alansutton
Apr 14, 2003 4:00 PM
If it still "autoshifts" after adjusting, make sure your chain and cogs aren't worn.
sorta fixedfiltersweep
Apr 14, 2003 6:01 PM
I loosened the body screw, which counter-intuitively enough tightens the derailleur, but something is still not quite right... and nothing should be worn.
re: Tensioning DA rear deraileurwielerpret
Apr 15, 2003 1:40 AM
As you describe it, I think its a matter of reajusting.
If you shift to the smallest cog, you should be able to tighten the cable and/or the derailleur until this gear runs smoothly. Since the intervals of the shifting mechanism are fixed it should be possible to shift into all gears without problems.
It may be that the ringlet with which the derailleur is fixed to the frame is slightly unaligned.
I had nothing but trouble with my carbon TREK and Ultegra triple. If I could shift, it rattled; if it didn't rattle, it wouldn't shift. In the end I got fed up, changed to Campagnolo with 2 front blades, and have been happy eversince. Perhaps the carbon flexed too much under stress, I don't know.
Good luck. Luke, Amsterdam.