synolimit

Can you teach me what 1.18 means? Stock tires are 245/40 and 275/35 and people say that's 1.18 but cannot find a calculator to prove this because I don't know where I saw it or what it means (been looking all day). If you go bigger you get understeer, smaller oversteer??

I know I want rpf1's. 18x10.5 +15 rear and pretty sure 18x9.5 +38 front with a 15mm spacer for a +23 overall. From all the pics I've seen this should put the wheels looking the same and just under flush with the fenders which is the look I like best.

Tires however I'm racking my brain for last 5 hours reading everything. To keep stock as much as possible it would seem a 265/40 and 295/35 would be equal since both are only going wider 20mm which might keep this 1.18. Overall height I know is going down from stock about 0.4-0.5".

If it helps I like to drag race, autox and hopefull find some track days so I'm not sure if I want a 1.18 or lower or even higher. I come from superbike racing so I guess I'm used to the back end stepping out.

FYI only 265/40, 295/35 I like and want to afford is conti DW's. had them on my WRX and loved them in a 245/35/18. I know their side walls are weak but in the 35 I never felt it but I'm not sure if they'll be up to the task of all the sporting I want to do. I also loved how light they were (weak side wall re-enforcement).

Any input?

Thanks

__________________
13 370z-