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pifko

Rear derailleur issues. When I'm in the big ring, shifting at the rear is fine, however when in the small ring, the chain slips when in gears 4-10 (i.e. its fine in the three largest sprockets), which isn't great as I'm in Yorkshire at the moment...

Chain and cassette replaced for new at the same time 2 weeks ago.

What the likely diagnosis here? B-Screw?

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Constable_Savage in reply to @pifko

I take it that the chain you replaced was the same length as the one you removed?
Sheldon says:

Full-link overlap, correct
with chain on the large chain-
wheel and sprocket but not yet
run through the rear derailer

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pifko in reply to @Constable_Savage

Well the chainset and cassette are different sizes to before (shifting was fine before also) - But you may be in to something in that the new chain may be too long. Thinking about it, I also get a little slippage in the 11 tooth in the big ring, which backs up this idea...

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