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  1. #1
    2-Cyl, 1/2 HP @ 90 RPM slvoid's Avatar
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    LBS says tire width can = rim width?

    I just called the LBS and the guy said if I wanted thinner tires that I can go all the way down to as thin as my rims are?
    My rims are around 1" wide, according to him, I can get tires that are 1" wide. Isn't it a rule that the tire's always supposed to be 1/4" or so wider than the rim?

  2. #2
    Republican Rider Punisher's Avatar
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    No, he is right.

  3. #3
    Senior Member Ebbtide's Avatar
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    I have 26X1 on my mountain bike. No problems at all.

  4. #4
    cycles per second Gonzo Bob's Avatar
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    You can probably go down to rim width if your rims are 18mm or 20mm wide (outside width) but I think for rims wider than that, you may run into difficulties. I once tried mounting 23mm tires on 22mm wide rims and could not get the tire to stay on the rim as I pumped it up.

    Here are some guidelines...

    http://www.sheldonbrown.com/tire_sizing.html#width

  5. #5
    Senior Member miamijim's Avatar
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    Yes, it can be done.
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  6. #6
    sch
    sch is offline
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    As the tire gets closer to rim width you will have more
    trouble mounting the tire and less room for the tube
    with increased risk, especially with road tires of difficulty
    with seating the bead into the rim and hence blowoff
    of the tire as pressures go above 50-70#. Note that
    tubes come in sizes too and you may want to get a
    narrower tube with thinner rubber to go along with that
    narrower tire. You can't stuff a tube for a 28-32mm
    tire into a 20mm carcass. If the tire is going to blow
    off the rim it will do so as or with in minutes of inflation.
    Nothing like a blow off at 110psi to get peoples attention.
    The converse is also true, don't use a tube intended for
    20-23mm tires in a 32mm tire, it will over stretch easily
    to fill the tire but any little manufacturing defect, scratch
    or mark will thin out preferentially and the tube may fail
    prematurely. Steve

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