Is there an indication on tyres about sidewall stiffness? I have been playing around with spring rates recently and I tried a new set of rims with different tyres and it made a difference to the ride quality. Is there any info I can find anywhere?
Tyres available here are :
Toyo
Yokohama
Michelin
Bridgestone

might say on here.

http://www.carbibles.com/tyre_bible.html

thats great! its going into my favourites.
It talks about load rating rather than wall stiffness, I wonder if its the same thing. A great read thou. Thanks