7900 dura ace rear mech
Moderator: robbosmans
Hi, I was reading a recent review of dura ace 9000 which said 'and the rear mech can now take a 28T rear cassette'. I have a 2012 S-Works Tarmac SL4 with dura ace 7900 throughout and am hoping to swap out my stock 12T-25T dura ace cassette for an 11-28T one (i'm going to the alps later in the year). Can anyone shed any light on whether this will work OK?
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Yes, the RD-7900 is spec'd for 28t max, there's also a cassette to go with.
(Personally I'm using the 7900 with the 11-28 SRAM Red cassette)
(Personally I'm using the 7900 with the 11-28 SRAM Red cassette)
Bikes: Raw Ti, 650b flatbar CX
Shimano's spec is conservative, both for max cog size and for chain wrap. I've gotten a 7900 to handle a 30t cog. How far you can go depends on the geometry of your frame's derailleur hanger.
