Shifting Problems

"Naaman G. Landers" <[email hidden]> wrote in message
news:[email hidden]...
: I am running an old 12 speed shimano drive train. Recently I notice that
the
: train feels rough as I shift into the lower gears. Thus far it is not
: skipping, autoshifting, or failing to cover all gear combos. Any ideas??

Sounds like a front derailleur problem to me. have you tried lubrication or
cleaning?

Pat in TX
:
:

Naaman G. Landers said:

I am running an old 12 speed shimano drive train. Recently I notice that the
train feels rough as I shift into the lower gears. Thus far it is not
skipping, autoshifting, or failing to cover all gear combos. Any ideas??

Worn cogs on the cassette? Take a look at the teeth (and the gums,
while you're there).

Naaman G. Landers said:

I am running an old 12 speed shimano drive train. Recently I notice that the
train feels rough as I shift into the lower gears. Thus far it is not
skipping, autoshifting, or failing to cover all gear combos. Any ideas??

Sounds as if the "B tension" screw is too loose, so that the chain is
getting trapped between the jockey pulley and the large rear sprocket.

See: http://sheldonbrown.com/derailer-adjustment for detailed instructions.

Sheldon "Shifty" Brown
+-------------------------------------------------------+
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Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
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