Cycling Equipment · Public discussion

Please help with tire size!

Started by Bruce W.1 · · Last activity · 6 posts · 473 views

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Cycling Equipment
Published
11 June 2004
Last activity
11 June 2004
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Bruce W.1
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  1. Just finished researching bicycle tires and I'm
    now totally confused. I need to get some new
    clincher tires for my road touring bicycle, with
    presta valves.

    The rims are Mavic MA 2. The outside diameter of
    the rim is 25" or 635mm. The distance between the
    rim edges inside is 14mm.

    The tires that are on there right now are
    Michellin HI-LITE Supercomp H.D. 700x23 C. They
    are starting to look aged and have a couple
    thousand miles on them.

    While it would be easy to just get the same size
    tire I instead would like to get something a
    little wider, because I have difficulty on gravel.

    My research indicates I could use a 23 or 25 mm
    width tire, so I'd like to use the 25mm.

    All the other numbers have me confused.

    Can anyone tell what size of tire to get? And any
    specific tire recommendations would also be welcome.

    Thanks for your help.

  2. "Bruce W.1" <[email hidden]> wrote in news:NE8yc.13762$ye1.7872
    @lakeread05:

    Quoted message said:

    Can anyone tell what size of tire to get? And any
    specific tire recommendations would also be welcome.

    If your old tire is a 700x23C, a 700x25C tire will fit on your rim. Wider
    tires like 700x28C will also fit the rim, but may not fit under your brakes.

  3. Bruce W.1 said:

    ...
    All the other numbers have me confused....

    See <http://www.sheldonbrown.com/tire_sizing.html>.

  4. If they will fit in your frame and under your fork crown, I would recommend
    Roly Poly 700x28
    (http://rivendellbicycles.com/webalog/tires_tubes/10033.html). I know that
    they fit on Mavic MA2 because that's the exact combination I am using.

    If you want something a bit cheaper, try the Conti Gatorskin 700x28.

    Nick

  5. Tom Sherman said:
    Bruce W.1 said:

    All the other numbers have me confused....

    See <http://www.sheldonbrown.com/tire_sizing.html>.

    According to Sheldon's chart, 700x28 tires aren't safe on my 13 mm
    rims. Is that true?

    Art Harris

  6. Art Harris said:
    Tom Sherman said:
    Bruce W.1 said:

    All the other numbers have me confused....

    See <http://www.sheldonbrown.com/tire_sizing.html>.

    According to Sheldon's chart, 700x28 tires aren't safe on my 13 mm
    rims. Is that true?

    It's pretty wide for the rim, but modern MTB tyres are *much* wider than
    their rims. If the tyre has a good anti-chafing strip where it meets
    the rim, it should be OK.

    Watch the brake adjustment though - the MTB tyres often run with a
    hair's breadth clearance between tyre and pad. A brake pad grabbing a
    tyre can lead to a very nasty accident indeed.

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