Required Wheel Size Percentage?

[When I'm 16...]

Alright, I remember reading somewhere to keep within X% of the original size of your cars stock wheels/tire, because it may cause problems to occur. I believe its +/- 3%?

Also, will these sizes all fit together/which is the better combo>

Front:Stock: 18x9 Wheels w/ 245/40-18 TiresModded: 18x8.5 Wheels w/ either 225/40-18 or 235/40-18 Tires

Rear:Stock: 19x10 Wheels w/ 265/35-19 TiresModded: 18x9.5 Wheels w/ either 255/40-18 or 245/40-18 Tires

These would be going on a 350Z Track (has brembo brakes)
Modified by When I'm 16... at 10:58 AM 8/1/2006

[hannibal]

Curious, why are you going with narrower wheels/tires?

Plus your specs into this calculator. It'll give you all the info you need...http://gs.tolan-hoechst.com/tirecalc.htm

EDIT: Site appears to be down. Heres a another calc...http://www.eunos.com/tirecalc/
Modified by IWannaS15 at 1:50 PM 8/1/2006