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Can a 26x4 tire fit in a 27.5 KH frame?

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  • davidp
    Kris also mentions the frame clearances in this post:

    The clearances are measured at the widest part of a 27.5 tire so there may be a couple of more mm's with a 26" wheel (due to very slightly shorter rim) - so if you have the 2017+ frame maybe you'd get 98mm of clearance.

    Note that Kris added the 2mm to the width of the frame from 2106-2017 to better support the Duro Crux 3.25" tire that he measures at 81mm on his 55mm rim. From that I take it that 15mm of clearance is better than 13mm to allow for tire variation and rim trueness.

    I have a bike with a 27.5x3.8 tire (Terrene Cake Eater) on a 52mm rim that measures 93mm wide at the knobs. Given that, I'm thinking even a something like a 26x3.8 on a 50mm rim would be extremely tight and likely to rub.

    If you want to cross from plus size tires to fat, a frame designed for that is probably the way to go.

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  • kunstrasen
    Post from Kris:

    Here are the vertical clearances for KH frames, measured from axle to underside of crown:
    KH20: 268.5 mm
    KH24: 338.5 mm
    KH27.5: 383.5 mm
    KH29: 401.5 mm
    KH36: 463.5 mm

    Horizontal clearance is mentioned on the KH home page for each frame. Just need to check your wheel dimensions now....

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  • bristlecone
    started a topic Can a 26x4 tire fit in a 27.5 KH frame?

    Can a 26x4 tire fit in a 27.5 KH frame?

    That is my question