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  • 27.5 Forks on 26 Frame
  • skybluestu
    Free Member

    Thinking of upgrading forks onmy Cotic Rocket 26 from 150mm revs to 160mm Lyrics.
    If I try to future proof a little by going 27.5 will this lower the bb even more than just with the extra fork length?

    Posted 7 years ago
    Daffy
    Full Member

    You’re Axle to Crown height is going to increase by at least 40mm, possibly upto 70mm) as the Lyricks, for a similar travel, have a longer A2C. Moving to a 650b will add around 20mm A2C on it’s own. You’re likely to raise your BB height by 20-30mm.

    Posted 7 years ago
    flyingmonkeycorps
    Full Member

    Surely if you go longer and 27.7 you’ll be raising the BB and slackening the head angle?

    I run 160mm forks on my 26″ Rocket and they’re fine; I reckon the extra height from the 27.5 forks won’t make too much difference over that.

    **edit** also, what he said.

    Posted 7 years ago
    core
    Full Member

    Longer forks will raise your bottom bracket.

    Posted 7 years ago
    poah
    Free Member

    no issues with mine

    Posted 7 years ago
    chilled76
    Free Member

    I’ve got some brand new Lyrik R 26 forks you can have for £250 posted.

    See classifieds if interested.

    Posted 7 years ago
    Stevet1
    Full Member

    Whats the offset on the new lyriks?

    Posted 7 years ago
    PJM1974
    Free Member

    As others have pointed out, fitting longer forks will lift your bottom bracket. I don’t know how feasible it is to fit an offset bushing to compensate, but even then you may end up with a taller BB than you started out with.

    Posted 7 years ago
    andybrad
    Full Member

    i run 27.5 forks on my 26″ bike.

    works fine.

    Posted 7 years ago
    poah
    Free Member

    makes very little difference

    Posted 7 years ago
    roverpig
    Full Member

    When I looked (Pikes rather than Lyriks though) going from 26 to 27.5 only changed A-C by 10mm i.e A-C on a 140mm 27.5 Pike was the same as on a 150mm 26″ fork.

    Posted 7 years ago
    skybluestu
    Free Member

    I meant raise!! 🙂
    Thanks for the responses so far.

    Posted 7 years ago
    skybluestu
    Free Member

    @chilled76, we have pm’d re your forks already. I was after mission control damper unfortunately.

    Posted 7 years ago
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