Thread: RD adjustment
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Old 12-15-21, 01:38 PM
Method to My Madness
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Originally Posted by yannisg View Post
Re-installed the RD 5700 with the 32 tooth sprocket. It seems to work ok. Except for the 11 and 12 cog with the 34 sprocket where the chain almost rubs on the upper pulley. I would not use those cogs with the 34 sprocket anyway.
Yes, using the two smallest cogs (in the cassette) with the 34T chain ring causes the chain to rub on the front derailleur cage (and maybe even the larger chain ring) and thus should be avoided if at all possible.

But what do you mean by "the chain almost rubs on the upper pulley"? The chain is carried by and thus must touch the upper pulley.

Originally Posted by yannisg View Post
I had to turn the RD adjustment screw all the way in to reduced the chance of the chain rubbing.
Do you mean the B screw (rather than the upper or lower limit screws)? The B screw is the one which adjusts the distance between the cassette and the upper pulley. If yes, that is to be expected when using a cassette with a cog (e.g., 32T) that is larger the maximum specified for the rear derailleur.
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