Are you confused by the markings on your tyres? Did you know that some tyres marked 28″ are actually much less than 27 inches diameter, or that 26×1.5 and 26×1½ are two completely different sizes!
How do you know what size tyres will fit your bike? It should be easy; simply buy exactly the same model of tyre as those already on the bike. Of course, this is not much help if identical tyres aren’t readily available, if you fancy something different or if you are looking for replacements in unusual and hard-to-find sizes. If so, then you’ll need to check the markings to be found on the side of the tyre. It’s worth noting that these markings have the potential to cause confusion, not least because a tyre’s ‘size’ can be hard to pin down. One way to define it, popular in times past, was to measure the tyre’s outside diameter and its maximum width when inflated, but this can be misleading. For example, some tyres marked 28″ are actually much less than 27 inches in diameter, while 26×1.5 and 26×1½ are two completely different sizes.

A guide to cycle tyre sizes | Cycling UK
Are you confused by the markings on your tyres? Did you know that some tyres marked 28″ are actually much less than 27 inches diameter, or that 26×1.5 and 26×1½ are two completely different sizes! How do you know what size tyres will fit your bike? It should be easy; simply buy exactly the same… [Read More]