Hi
yesterday I wanted to change my 12-25 to a 11-23 and I had troubles adjusting my rear derailleur so that that the chain would run smoothly on my 11. I tried everything up to adding/removing spacers (do you actually need spacers between your biggest cog and the wheel?).
It kept on bouncing up and down my 11 and regardless the adjustments I made on the derailleur it kept on doing the same. I changed it back to my 12-25 and no more troubles and it runs like butter....

wheelset: Zipp 404's (tubular)

Any thoughts what I do wrong?

Thanks!!

Yoeri
Hong Kong.

You might take this question to the mechanical forum...

wrong subforum..