Running 18's doesn't necessarily mean a smaller diameter tire. Mine are the same. It depends on what sidewall dimension you have.
My switch: The decrease in launch times comes from the increase in sidewall, which allows the tire to squat and increase surface area onto the pavement. If I could fit a tall 16" tire, so much better.
Coop
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Jim Cooper - (Retired: '08 Infiniti G37 Sport • TheShopCT built • 11.13 @ 123 mph (click for vid) • GTM Stage II Twin Turbo • 5-speed A/T Level Ten built • 591whp @17 lbs boost)
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