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Old 02-23-11, 04:39 AM   #1
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Campagnolo Rear Derailleur B screw woe


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.

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?
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Old 02-23-11, 07:44 AM   #2
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If the crank feel isn't smooth, the jockey pulley may indeed be touching one of the cogs under load.
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Old 02-23-11, 03:20 PM   #3
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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.
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