Originally Posted by
SSSTANG
I'm looking at a rear derailleur on ebay. It is advertised as a Shimano Ultegra RD-6500 9 speed rear derailleur. Will this work on a 10 speed double?
Yes.
Originally Posted by
SSSTANG
What is the difference between a 6500 and a 6600? Thanks
100.
Its supposed to be stiffer and lighter, or something like that. It's unlikely that anyone can tell the difference.