15x7 STEEL OLDS SSIII widened? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 04-25-2007, 11:19 AM
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15x7 STEEL OLDS SSIII widened?

Hello, Ihave been all over then net and found so many angles and answers and wrong or confusing info Id like some help.
My 72 supreme has non stock but true olds 15x7 8" wide 4 3/8 bs SSIII, NOT Chrome wheels on it. Im thinking on widening the rear ones to 15x10, since aftermarket has done it with the chrome ones but "they" don't have the same bs as all steels do. My car is lowered 1 inch. Several small questions.

Will 15x10 fit with the reccommended 5.5 bs and rub? Do I dare request he makes mine into 15x9s?? Since a 15x7 olds actually are 8" from rimtip to rimtip, how or where do I measure to add in? To make 15x10 work regardless of fitment in my rear fender to make it 5.5 backspacing as reccommened by most, steel would have to be added before and aft of the spokes attachment to the outer rim? I see this is a lot of work. If 15x10 are max that fit in fenders IS? 5.5 correct backspace or 5.0 as others suggest? Please any and all info is such appreciated.

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Old 04-27-2007, 03:10 PM
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The only thing I can suggest is finding a set of wheels with the size and backspace you want ... and trial fit them OR ...

When your car is sitting still ... does it have 2 inches or more of clearance in the wheel well ?? Most wheel companies can add 2 or 3 inches to the backside of a stock rim fairly easily.

A 7 inch rim is 8 inches across at the widest point ... so a 10 inch rim would actually be 11 inches across. Fairly W I D E ... and I seriously doubt you have that much room without cutting the car ...

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