http://citycyclingedinburgh.info/bbpress/ CityCyclingEdinburgh Forum » Topic: Tyre size en Mon, 08 Jun 2026 08:12:02 +0000 http://citycyclingedinburgh.info/bbpress/topic.php?id=21957#post-384624 Sun, 07 Jun 2026 21:44:02 +0000 chdot 384624@http://citycyclingedinburgh.info/bbpress/ <p>Are both tyres marked 27 x 1 1/4 and 32-630?</p> <p>And the rim 27 x 1 1/4</p> <p>If so and new one doesn’t fit sounds like manufacturing fault</p> <p>Presume you put tyres next to each other?</p> <p>Some tyre don’t like ‘hookless’ rims</p> <p><a href="https://www.facebook.com/groups/2768540909930544/posts/6372936569490942/" rel="nofollow">https://www.facebook.com/groups/2768540909930544/posts/6372936569490942/</a></p> <p>Have you bought Panaracer Pasela or similarly? </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=21957#post-384622 Sun, 07 Jun 2026 21:21:05 +0000 Frenchy 384622@http://citycyclingedinburgh.info/bbpress/ <p>I recently bought a "27 x 1 1/4" rim and a "27 x 1 1/4" tyre.</p> <p>Unfortunately the tyre appears to be too big for the rim.</p> <p>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? </p> <p>Am I right that the (inner) diameter of the tyre should be 630 mm?</p> <p>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. </p>