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12" x 18" rear wheels, what backspace?

4640 Views 4 Replies 5 Participants Last post by  terrys6t8roadster
hi, i just ordered some intro wheels in 12" x 18" rear and they ask what backspace i want... im nut sure if 4" is ok or should i have 5"? the car has wide fenders and now its got 15" with 285 tires and 1/2" spacer and the wheel looks really bad its like 2 - 3 inches inside from the fender lip... that why i want wider wheels... what would you recomend?

thanks and happy new year
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Corvette central has a wheel calculator on there website
You are going to have wider wheels than me,!!!! mine are 18x11 with 5.5 back space but I've have offset trailing arms.
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