[Richard Hudgins]

Machiavelli,

I am not in any way suggesting that you do not use the 18 inch wheels.

There is a much better selection of tyres available in 18 inch.

I just need to know the sidewall construction in order to give Larry the spring rates and damper curves.

But this as I stated may be of very little import as the 17>18 inch tyre spring rate may be so close that nothing needs to be done. (If it does need to changed it is not at all a big deal, I just spec the bits to Larry and he puts them on the chassis.)

Stick with the 18's.