Quote:
Originally Posted by Glen e
You’re making a big mistake, everyone told you that here, in your other post. 18s will leave you with huge wheel gap’s with a 30/35 tire, the car will look like a 4 x 4… adding a large sidewall tire looks bad. the Camaro is made with oversized large wheel wells to accommodate the 20s. Don’t do it, (but I think you’re going to anyway).
Talk to an expert, p.m. paul at PK design who is here on many of the wheel threads.
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As long as the OP goes up the matching ratio on the sidewall the wheel gap will not change.
OEM
Front - 245/40-20 = 27.72
Rear - 275/35-20 = 27.58
on 18" wheel
Front - 245/50-18 =27.65
Rear - 275/45-18 =27.74
On the OEM setup the fronts are slightly larger than the rear. If the OP only goes up in aspect ratio on the tire sizes the rear will be ever slightly larger than the fronts, the car will be fine though as it will be with in the system tolerance.
Generally for every inch / " of wheel size you go up or down you must either drop or raise the aspect ration 5 (40 to 45 as an example) to stay close to the original rolling circumference size.