Tyres and Wheel - Comprehensive guide

[Kagetsu]

For those who've been confused in the passed about wheels, tyres and the likes, and optional components available, I've collaborated a list of site and faqs that will likely help people in their choices.

This is a brilliant 'bible' to car tyres, and in fact, the site has a lot of useful information in general. Interesting read all around.
http://www.carbibles.com/tyre_bible.html

Tyre Designations etc.
http://www.dunloptire.com/care/tech.html

There are others, but the first site is very comprehensive.

[Bananaman]

On a more basic level, this site is handy for working out diameter and speedo differences with different wheel and tyre width / profile combinations

http://www.miata.net/garage/tirecalc.html