Advertise on Bikeforums.net



User Tag List

Results 1 to 5 of 5
  1. #1
    Senior Member
    Join Date
    Jun 2012
    Location
    CA / OR Border
    My Bikes
    2 old Schwinns + 4 dahons
    Posts
    97
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Confused over buying Tires. ISO 57-559

    I am new at all this new tire stuff. Need new tires.
    Looking for 26 x 2.125
    Has the ISO marking is 57-559.

    Question... will any tire of that size fit? That is marked 26 x 2.125? What about 26 x 2.2 ?

    I see Bike Nashbar has a sale going on, but yet when I look at the specs of the tires... I see no ISO reference.

    And finally, any recommendation of a good tire to buy?
    The bike is a combo street/ dirt bike.
    No price restriction.
    THANKS

  2. #2
    7-speed doomsday prepper ThermionicScott's Avatar
    Join Date
    Aug 2011
    Location
    CID
    My Bikes
    1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX
    Posts
    8,355
    Mentioned
    8 Post(s)
    Tagged
    0 Thread(s)
    Generally, if the width marking is decimal as opposed to a fraction, it'll be a 559 rim, so it would work on your rims.
    Quote Originally Posted by chandltp View Post
    There's no such thing as too far.. just lack of time
    RUSA #7498

  3. #3
    Banned.
    Join Date
    Apr 2011
    My Bikes
    CCM Torino 76
    Posts
    937
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yep. 26 X 1.5, 26 X 2.1, 26 X 1.9, 26 X 2.35 etc. will all fit on your rim. 26 X 1-3/8, 26 X 1-1/2 and similar will not work.

  4. #4
    Senior Member
    Join Date
    Aug 2009
    Posts
    239
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    That ISO marking means the tire is 57 millimetres wide, and fits on a 559mm diameter (bead seat) wheel. It's the metric version of what's called a 26" wheel in United States. Whether the tire will actually be 57mm wide on your bike depends on how wide your rim is; modern skinny rims will make the tire a bit narrower. You also don't know if they're measuring the casing diameter, or the extreme width over knobs if they project beyond the casing. Visit sheldonbrown.com and look for the tire articles. There's lots of good info on that site.

    As for specific tires: for mountain riding I like WTB Weirwolf. They've been reliable and have great traction, and even roll decently on the pavement part of my ride. I've also done well with Specialized Nimbus and Hemisphere tires. Don't much care for Panaracer because two of them have blown out the sidewall for no good reason that I could see. There are many, many tires in sizes to fit your bike.

  5. #5
    Asi
    Asi is offline
    Engineer Asi's Avatar
    Join Date
    May 2010
    Location
    Bucharest, Romania, Europe
    My Bikes
    1989 Krapf (with Dura-ace) road bike, 1973 Sputnik (made by XB3) road bike , 1961 Peugeot fixed gear, 2010 Trek 4400
    Posts
    489
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    In the imperial notation (inches/feet/etc.) and in various weird notation (like french with 700C/650B/700A/etc) are all a mangle of brand marks, and do not reflect the actual size of something.

    26" is just a general size.. there are at least a dozen of different 26" rims (that require different bead diameter tyre). Also french notations with 700C is something with general outer diameter of 700mm (with tyre on), and to make a distinguish between at leas 3 types that were common (622/630/635/642) thy put something like A/B/C, so 700C is 622mm. A mash of notations that do not reflect a measurable dimension is decrypted in Sheldon Brown's site, to give accurate corresponding dimension with the ISO for each weird unnatural notation.

    So some guys from the ETRTO made a clever thing to put notations of the actual size and description of the tyre and the rim.
    So 559mm is the diameter of the bead diameter, all tyres marked with 559mm bead diameter fit a 559rim (with some recommendations about the maximum and minimum width of the tyre according to rim width, but nonetheless it fits anyway, while a 572mm will never fit a 559).
    A 559x25J rim means 559 bead diameter, 25mm width between the beads, and J is the hook profile for the tyre that fits that bead, often omitted for bikes since it's not so important and not many variation exist. For a tyre a 37-559, 37mm width of the fully inflated to nominal pressure tyre, and 559 bead diameter.

    Bottom line is: Stick to the ISO/ETRTO cause it's better and manufacturers all over the world converted to that (as in always having ISO notation)
    That's a good thing to standardize and stick to the same things. Some converted to metric some to imperial. Bikes are still in the imperial area with the threading on BB, on FW hubs, pitch of chains (1/2" which is great to have 1/2" on ALL chains, just as well where we have ISO notation on tyres - it removes the confusion over some oddballs and deformed meaning of proprietary notation)
    Last edited by Asi; 07-12-12 at 10:02 AM.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •