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285 40 17 on a 5.5 inch backspace

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Old 03-06-2012, 06:13 PM
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Car: 1985 Camaro IROC-Z
Engine: 350
Transmission: GForce T-5
Axle/Gears: 10 bolt 3.73 posi
285 40 17 on a 5.5 inch backspace

Anyone running this particular combination in the rear?
I know 275's fit with zero clearance issues. Are the 285's no problem?
I really don't want to get into hammering.
Old 03-06-2012, 06:18 PM
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Re: 285 40 17 on a 5.5 inch backspace

need the rest of the wheel specs, without them 5.5" of BS is meaningless.

a 285 will fit though, on a properly spec'd wheel
Old 03-06-2012, 06:35 PM
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Car: 1985 Camaro IROC-Z
Engine: 350
Transmission: GForce T-5
Axle/Gears: 10 bolt 3.73 posi
Re: 285 40 17 on a 5.5 inch backspace

Originally Posted by //<86TA>\\
need the rest of the wheel specs, without them 5.5" of BS is meaningless.

a 285 will fit though, on a properly spec'd wheel
whoops, sorry.
they're iroc replicas widened from 17x8 to 17x9.5. I have a 1/2" spacer. So 4.5 inch stock bs becomes 6 inch backspace with the widening. With the spacer, it becomes 5.5 inch.
Old 03-06-2012, 06:43 PM
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: 285 40 17 on a 5.5 inch backspace

they should fit fine as they are, if anything i would say a 1/4 spacer. Bolt them up and see what happens. Might have to do a little hammering possibly, but who knows.
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