Your thought on my backspacing - Team Camaro Tech
Wheels & Tires What fits what?

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post #1 of 2 (permalink) Old Feb 20th, 05, 04:45 AM Thread Starter
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sixd8rs's Avatar
Join Date: Jan 2002
Location: Westminster,Md,usa
Posts: 967

I am about to buy some 17" rims. I installed my neighbors 17 x 9.5" rims on the back. 275/40 tires. Due to my 9" thats narrowed an 1-1/2 2" or so and my so called mini tubs (frame wasnt notched but added a 2" band to tub). His tire was just touching my leaf springs. Within 1/16th. I would like to go with a taller tire as well.
So here are my measurements:
I need a 1/4" away from that spring.
So that takes me to 5.25 BS
How much wider will a 285/40 be than a 275/40.
Every tire manufacture is different im sure.
I should probably go 4.75 BS and be safe?

68 RS
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post #2 of 2 (permalink) Old Feb 20th, 05, 10:44 AM
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Join Date: Jan 2003
Location: Lavalette WV USA
Posts: 821

Man that's gonna make your car look 100% better. You need an exact measurement on your rear end. The standard backspace for a 9.5 inch rim is 5.5 inches, so if your rear is 2" narrower, you will need 4.5 BS on both sides.

1967 RS Coupe (clone): 406 SBC, Thorley headers, Muncie, Hotchkis suspension, Centerline Matrix 17" wheels with Nitto 555's, Baer brakes, 12 bolt 3.73 posi, RS conversion, Vintage Air, PPG Hot Red. (SOLD)

1968 RS Coupe: Project...Mini-tubbed, Cammed LS 6.0, T56, 12 bolt 3.73 posi, Ridetech 4 link...slowly adding more...
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