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Old 06-05-21, 03:27 PM
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So I finally got hold of 2 new CS R8000 Ultegra cassettes - a 12-25, and a 11-32T.
my Di2 6870 rear mech is short cage, so for now I put the cassette onto my wheel, and put the bike up onto the stand, turned the cranks and shifted up and down through gears, but avoiding the final 2 lowest - 30T & 32T so as not to foul anything up.
ive got a 17-20T jump, and although that shift isn’t quite as crisp as the rest when changing to lower gears, it certainly didn’t struggle jumping away until it “caught”, more just a fraction of a second longer to jump on to the larger sprocket, than the others.
definitely looks workable but I don’t know whether this running OK on the bike stand is in anyway similar to what I would find out on the road…..if it’s as I’m seeing, then I’d be happy and prepared to buy the new 8050brear mech - medium cage.

be interested in peoples thoughts
Davidb67 is offline