Wheel and tire sizes....what is too much?

[Wally]

Hey Ken,
Nice to read from you again here!

For me, I thought 18" wasn't neccesary and I thought better allround performance could be had with a smaller, lighter tire and wheel combo so I switched to 17".

Don't have direct comparable results to share, but I feel I didn't loose any traction switching to a smaller front tire. Rear stayed 245 wide in 17" also and both on a 9J rim, but front size went down from 225/18 to 205/17 (from 7,5"/18 to 7"/17) without any traction loss (understeer) over the 225/18 combo :-)

Did save kilo's in unsprung weight going to 17" :-)