Confusing

[nickk]

Kids have skidded thru the tyre need to order a replacement ,but how can it be two different diameters?

 

[badabec]

If you want a headache, have a look at this chart

A guide to cycle tyre sizes | Cycling UK

26×1.5, 26×1½ , 700×25C – trying to work out what tyre sizes your cycle needs can be confusing. Richard Hallett, Cycle magazine technical editor, explains what all those numbers mean so you’ll always be able to find the right tyres

www.cyclinguk.org

Or take the tyre with you. 16 x 1.5 is not the same as 16 x 11/2. A friend made that mistake and asked me to fit it. The new one was nearly 2 inches smaller in diameter.

 

[macplaxton]

Just go by the ETRTO size (305) that's the bead seat diameter in mm. 38 is the width also in mm, but you have leeway on that size depending on the width of the rim and fork/mudguard/brake clearance.

 

[gaz1]

thats not skidded through that is a near on flat tyre ridden and then skidded sideways on it

bone idolness where they didnt even blow it up

 

[atomant48]

At least you’re halfway there getting it off the rim. I had to replace a tube in my sons recently - I presume it’s the “tubeless ready” rims that make it far more difficult than I remember.

 

[minimutly]

Three different ways to measure bike tyres apparently - the only sensible one is the wheel dia and width, but that doesn’t tell you the “balooneness) or size of the tyre. I’m 59 and never knew this until recently.
Some Halfords bikes and maybe others used some weird size tyres which are now impossible to get in the shops, and difficult online - I managed to find a pair for my eBay runabout, but failing this the next best fit would have been a wheelchair tyre!