Join Date: Jan 2008
Bikes: Dawes road bike and Trek Antelope 850
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Poor shifting rear setup
Can anyone help diagnose a poor shifting rear set up? Its a Suntour Ultra 6 13-28 with Suntour ARX changer and Powershift (non-index) shifters. Upshifts are very clean and quick, but downshifts are noisy and reluctant and slow. I have fully dismantled and relubed the derailleur, and the cable and shifter are all free and smooth moving.
Last night I borrowed a different RD, a Suntour VX GT, and its no better with that.
I could do with some pointers to help narrow down the cause, rather than replacing bits at random to see if it helps. Could this be caused by a worn chain?
Thanks in advance, Tony S