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  1. #1
    Senior Member
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    May 2008
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    Campagnolo Rear Derailleur B screw woe

    Hi,

    I am using a 10speed campy centaur rear derailleur. I tried tuning my the rear derailleur B screw. When i tighten the b screw, the upper jockey wheel is near to the largest rear cog but not rubbing which I read is the correct way. However when compared to when i loosen the b screw, the upper jockey wheel is much further away from the largest rear cog, the pedalling feels abit more rougher but have a more solid feel.

    Summary
    B screw loosen - very smooth crank movement - upper jockey wheel further from largest rear cog
    B screw tighten - not as smooth crank movement but more solid, change gear faster - upper jockey wheel near but not rubbing largest rear cog


    Which should be the correct way?

  2. #2
    Senior Member
    Join Date
    Aug 2005
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    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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    If the crank feel isn't smooth, the jockey pulley may indeed be touching one of the cogs under load.

  3. #3
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
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    B-screw adjustment for campy is close as possible in small ring/large cog combo without rub, when shifted into the largest cog from the 2nd largest.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

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