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  • 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?

  • Almost certainly not the B-screw adjustment. This only really affects the accuracy and ease of shifting.

  • I had this (Campag), just needed a bit more fiddling with the barrel adjusters.

  • 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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