Quote:
Originally Posted by CalgaryZL1
I am confused, ZL1-Auto is still sticking with the XXX/30/20 ratio am I missing something here with the diameter? Is it slightly different with tire manufacturers?
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A 305/30/20 has a 3.6” sidewall and a 27.2” diameter across the tire. A 345/30/20 has a 4.1” sidewall and a 28.1” diameter. Tire manufacturers play a little role, but a 345/30 means that 30% of the width is the sidewall, so a wider tire with the same aspect ratio means a taller sidewall, and taller overall tire. Hope that helps.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150