Rear Derailleur upgrade
I have an ultegra 6400 RD (8speed) on my road bike. Several years ago I upgraded to a 9 speed cassette with no problems indexing through all gears. However my rear pulleys are chewed up from running the narrower chain on them. I know I can get the replacement 10 tooth pulleys for cheap, but...
Does anyone know if you can put the 11 tooth (9 speed) pulleys on a derailleur made for the 10 tooth pulleys?
I know I can just get a new 9 speed derailleur on the cheap if I look long an hard enough, but the one I have is nice and it works.
they should work just fine for you.
Are you sure they are chewed up fromt he narrower chain? My understanding is that the internal width of a 9 speed chain is the same as a 6/7/8 speed chain.
I would go with the 10 tooth pulleys myself. I would not be surprised if the larger pulleys cause the chain to rub on part of the derailleur cage... only one way to find out, though!
Thanks guys, I'll post info when my new pulleys come in.