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Shifting Problem:Bad technique or Equipment adjustment?(3 posts)

Shifting Problem:Bad technique or Equipment adjustment?pessot
Jul 25, 2003 7:00 AM
I am experiencing some sloppy shifting on my new ride.
Its a GIOS with Chorus 10 speed, with about 600 miles
on it so far.

When I shift up from say the 19t to the 21t cog,
and I continue to pedal during the shift, the chain
temporarily climbs slighty beyond the 21 tooth cog
and then back down. It never really grabs the 23,
but the shift is not clean.
If I do the same thing with no pedaling during the shift,
the chain goes cleanly onto the new cog without
overshooting, but shifting is slower this way.
I always try to reduce my pedal pressure when shifting,
so there isn't tremendous tension on the chain when I
shift. This doesn't seem to happen on the smaller cogs,
i.e. 13-14 or 14-15. I never had this happen on my
older 8 speed.

Am I depressing the shift lever to far beyond the "click",
which I have to learn to control or
or do I have some trial and error fine tuning ahead?

tension adjustmentDougSloan
Jul 25, 2003 7:08 AM
I'd try screwing in the tension adjustment screw in 1 turn increments on the rear of the derailleur (making the cable housing slightly shorter, in effect).

lots of help at Park Tools siteDougSloan
Jul 25, 2003 7:10 AM