Quote:
Originally Posted by Velocipede
The EKAR rear derailleur WILL NOT work with a 12/11/10 speed rear shifter. They are not designed the same. One is a 2d geometry and one is 3d geometry. I should've mentioned this in the questions/answers post I did. Sorry. This comment(will not work) is from Campy directly. I have not tried it. No reason for me to try it right now.
EKAR is stand alone for now. I am I have no info on a 13 speed road kit. I don't think they could do it though. 130mm rear spacing, I don't see how they could cram 13 in there. 12 is pushing it now.
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130 or 135 rear spacing doesn't make a difference on the Cassette/freehub width - All things being equal it's the distance between the Hub flanges that changes. The Cassette is just spaced 2.5 mm farther out and that is why the chain lines are going wider to compensate.