Tyre sizes explained

[Iceman]

http://www.difflock.com/offroad/tyresizes.shtml

Easy to understand and well written.

[minger nick]

Very handy Iceman... Tyres sizes confuse the hell out of me! :?

Some other useful tyre size pages I have found...

Changing your tyre/wheel size? How will it effect your speedo?
Or just want bigger wheels and lower profile tyres with the same overall diameter as standard?
www.miata.net/garage/tirecalc (http://www.miata.net/garage/tirecalc)

UK to US (and visversa) tyre size conversion.
www.autisticcuckoo.net/tools/units/tyres.php (http://www.autisticcuckoo.net/tools/units/tyres.php)