CityCyclingEdinburgh Forum » Questions/Support/Help

Tyre size

(4 posts)
  • Started 2 months ago by Frenchy
  • Latest reply from Arellcat
  • This topic is not resolved

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  1. Frenchy
    Member

    I recently bought a "27 x 1 1/4" rim and a "27 x 1 1/4" tyre.

    Unfortunately the tyre appears to be too big for the rim.

    I find tyre/rim/wheel sizes to be a confusing minefield. Can anyone confirm the easiest way for me to check whether my rim or my tyre (or both), is the wrong size?

    Am I right that the (inner) diameter of the tyre should be 630 mm?

    I've managed to put the old tyre on the new rim, so I'm fairly sure that the new tyre is the culprit, but I'd like to be absolutely sure before returning it to the seller.

    Posted 2 months ago #
  2. chdot
    Admin

    Are both tyres marked 27 x 1 1/4 and 32-630?

    And the rim 27 x 1 1/4

    If so and new one doesn’t fit sounds like manufacturing fault

    Presume you put tyres next to each other?

    Some tyre don’t like ‘hookless’ rims

    https://www.facebook.com/groups/2768540909930544/posts/6372936569490942/

    Have you bought Panaracer Pasela or similarly?

    Posted 2 months ago #
  3. urchaidh
    Member

    I discovered (to my cost) that '24 x 1.25' and '24 x 1 1/4' are not the same rim diameter, not even close.

    ETRO, and Sheldon Brown are your best hope.

    Posted 2 months ago #
  4. Arellcat
    Moderator

    I too discovered likewise; 26 x 1 3/4 and 26 x 1 3/8 are not the same as 44-559 and 35-559.

    Posted 2 months ago #

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