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Old May 16th 07, 10:42 PM posted to rec.bicycles.tech
Chris Nelson
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Posts: 163
Default Shifting problems

On May 15, 7:21 pm, Michael Warner wrote:
On 15 May 2007 10:05:24 -0700, Chris Nelson wrote:

So I picked up a used tandem (Trek T900) and its a hoot but it has
some rear shifting problems. More specifically, when shifting the
chain momentarily sits on top of the cogs before settling in, creating
a temporary cadence increase. Once shifted, it runs fine. It happens
on up and downshifts, and I believe to have it adjusted correctly as
far as indexing, because it shifts flawlessly in the workstand. It
only has problems under load.


IME a bike which shifts perfectly on the stand but badly under load
has an over-worn chain and/or cluster. Try replacing the chain, but
you'll probably also have to replace the cluster.

--
Home page:http://members.westnet.com.au/mvw


I just ordered an SRAM PC-68 8SP CHAIN, maybe that will go better with
the cog that's on there. Everything else seems to be in order(thanks
everyone for the input). If that doesn't do it, I'm thinking of going
to all 9-speed stuff instead of the mix that's on there now. This
would also allow me to upgrade to higher level components such as XT.
The rear hub that is on there is a no name. If it takes an 8-speed
cog, should it be able to take a 9-speed cog? Or might I run into a
problem there?

Chris

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