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  1. #1
    Muscle bike design spec robtown's Avatar
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    26" x 1 1/4" rim = 26" x 1 3/8" tire????

    I ordered 26 x 1 3/8" tires (cheng) to go on the Araya 26 x 1 1/4" rims. The wire bead tires are too small!

    I knew they were odd ball sizes but do I need 26 x 1 1/4" tires?!
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  2. #2
    Senior Member bikeman715's Avatar
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    yes you need a 26 1 1/4 tire you sure it 26 and not 27 ? the 26 x 1 3/8 are for old Schwinn and dept. store 's bikes from years back.

  3. #3
    Muscle bike design spec robtown's Avatar
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    Quote Originally Posted by bikeman715 View Post
    yes you need a 26 1 1/4 tire you sure it 26 and not 27 ? the 26 x 1 3/8 are for old Schwinn and dept. store 's bikes from years back.
    The rim has 26 x 1 1/4" stamped on it. It's from a 47cm Univega Nuovo Sport probably 20+ years old.

    26 x 1 1/4" as in MTB tire?
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  4. #4
    Senior Member Retro Grouch's Avatar
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    Quote Originally Posted by robtown View Post
    The rim has 26 x 1 1/4" stamped on it. It's from a 47cm Univega Nuovo Sport probably 20+ years old.

    26 x 1 1/4" as in MTB tire?
    I'm going to guess that they'll work but I honestly don't know for sure. I shudder every time that somebody mentions the 26 X 1 3/8 tire size because there is more than one bead seat diameter that's so labeled.

    I'm sure you are aware that 26 x 1 1/4" isn't the same as 26 X 1.25" so far as bicycle tires are concerned.

  5. #5
    biked well well biked's Avatar
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    Here's a good reference that should help you figure out what you need. The most important number is the bead seat diameter of the tire and rim.

    http://www.sheldonbrown.com/tire-sizing.html

  6. #6
    Muscle bike design spec robtown's Avatar
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    Quote Originally Posted by well biked View Post
    Here's a good reference that should help you figure out what you need. The most important number is the bead seat diameter of the tire and rim.

    http://www.sheldonbrown.com/tire-sizing.html
    Thanks. I dual posted in C&V and a couple posters there have lots of experience with these old non standard sizes.
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  7. #7
    Senior Member DieselDan's Avatar
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    There are 4 different 26" rims. Check the bead size on the tire, usually in parenthesis next to the tire size. At work, I have 559, 590, 584, and 597 bead seat tires, all listed as 26". The 584 size may be labeled as 650B.
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    Senior Member melville's Avatar
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    If the 26 X 1 3/8 were too small you do need a 26 X 1 1/4. The bead seat diameter for the 1 3/8 tire is 590mm, you need 597mm.

    You may find a fit at an old Schwinn shop, but it might be a heavier tire than you want. I haven't seen a high pressure tire for 597 since 1990, but I've been out of the industry since 2000. Things may have changed.

  9. #9
    Senior Member mike's Avatar
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    Quote Originally Posted by Retro Grouch View Post
    I'm going to guess that they'll work but I honestly don't know for sure. I shudder every time that somebody mentions the 26 X 1 3/8 tire size because there is more than one bead seat diameter that's so labeled.

    I'm sure you are aware that 26 x 1 1/4" isn't the same as 26 X 1.25" so far as bicycle tires are concerned.
    Huh? I didn't know that 1 1/4 didn't equal 1.25. Please explain.

    For the VAST majority of old 26" tires in the USA, there are only two types to consider, really:

    1. Schwinn
    2. Everything Else


    Schwinn tires fit Schwinn 26" rims and nothing else and visa versa.

    Other than that, I found that it was nearly impossible to get a modern mountain bike tire onto an old 26 X 1 3/8 rim. No amount of swearing or soap would make it work. However, I am with RetroGrouch that a 1 3/8" tire should fit onto a 1.25" rim on old bikes (over 20+ years old).

    What exactly seems to be the problem?
    Mike

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