Float -- 100mm v 90mm rims- Mtbr.com
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  1. #1
    Anchorage, AK
    Reputation: Lars_D's Avatar
    Join Date
    May 2011

    Float -- 100mm v 90mm rims

    My 4.8 inch Jumb Jim tires are just a bit too close to the chainstays for comfort (maybe 3mm of clearance on each side) with 100mm Sarma rims. I am thinking that I'd have an additional 2mm or so on each side if I switched to Nextie 90mm rims (or maybe HED 85mm rims). In the real world, how much float would I really be giving up?

  2. #2
    beer thief
    Reputation: radair's Avatar
    Join Date
    Dec 2002
    Probably next to nothing that a half a psi couldn't counter.

  3. #3
    turtles make me hot
    Reputation: NYrr496's Avatar
    Join Date
    Sep 2008
    I can't believe you'd feel any difference in float.

    I just switched from 100mm Clownshoes to 80mm Other Brother Darryls. Bike FEELS better and with the same 4.8" tires, I didn't feel any worse in the snow.
    I like turtles

  4. #4
    Human Test Subject
    Reputation: Volsung's Avatar
    Join Date
    Nov 2011
    I went from clownshoes to 90s (85 internal) and back to 100mm Sarmas. Never noticed the difference.

  5. #5
    aka bOb
    Reputation: bdundee's Avatar
    Join Date
    Feb 2008
    I went for 100's to 90's and didn't notice any difference.

  6. #6
    mtbr member
    Join Date
    Jan 2015
    Likely will have to run lower air pressure for the same footprint as the same tire on a 100mm wheel. The added resistance of lower pressure is the downside.

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