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Old 02-18-2015, 06:00 AM
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Car: 1984 chevy camaro
Engine: 355
Transmission: turbo 350 2800 stall
Axle/Gears: 3:73 detroit locker posi
what backspacing
what backspacing should I use for 16x7 rims on an 84 Camaro z28?
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Old 02-19-2015, 12:24 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: what backspacing
Why so narrow?

3.75"
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Old 02-19-2015, 06:04 PM
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Car: 1984 chevy camaro
Engine: 355
Transmission: turbo 350 2800 stall
Axle/Gears: 3:73 detroit locker posi
Re: what backspacing
street strip car. 3.75 will keep it tucked and not stickout?
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Old 02-19-2015, 08:45 PM
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Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: what backspacing
Will be stock.
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Old 02-20-2015, 07:06 AM
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Car: 1983 Z28
Engine: 385 Fastburn
Transmission: T-5
Axle/Gears: BorgWarner 9-bolt posi, 3.27 gears
Re: what backspacing
Originally Posted by //<86TA>\\
Will be stock.

^yup^
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Old 02-21-2015, 03:24 PM
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Car: 1984 chevy camaro
Engine: 355
Transmission: turbo 350 2800 stall
Axle/Gears: 3:73 detroit locker posi
Re: what backspacing
Originally Posted by //<86TA>\\
Why so narrow?

3.75"
they don't carry the size rim I want in 16 would backspacing be the same for a 15x7? and what size tire would look nice on them? I have 15x8 on back with 275/60 15 m&h slicks
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Old 02-21-2015, 10:45 PM
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Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: what backspacing
I like 235/60r15s on the front 7in wheel I have with 3.75bs. 255/60r15 on the rear on a 8in wheel with a 3.75bs.
The 235/60r15 is 26 in Diameter
The 245/60r15 is 26.6in Diameter
The 255/60r15 is 27in Diameter
The 275/60r15 is 28 in Diameter


I guess it depends on how much rake you want. Either a 235 or 245 will fit a 7in wheel.
I run the combo at the top giving me a 1in lift in the rear.
A ton of 235/60r15 photos in here with 3.75bs front and back.
https://www.thirdgen.org/forums/whee...er-cobras.html
Last edited by Ron U.S.M.C.; 02-21-2015 at 10:50 PM.
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Old 02-24-2015, 12:12 PM
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Car: 1984 chevy camaro
Engine: 355
Transmission: turbo 350 2800 stall
Axle/Gears: 3:73 detroit locker posi
Re: what backspacing
Originally Posted by Ron U.S.M.C.
I like 235/60r15s on the front 7in wheel I have with 3.75bs. 255/60r15 on the rear on a 8in wheel with a 3.75bs.
The 235/60r15 is 26 in Diameter
The 245/60r15 is 26.6in Diameter
The 255/60r15 is 27in Diameter
The 275/60r15 is 28 in Diameter


I guess it depends on how much rake you want. Either a 235 or 245 will fit a 7in wheel.
I run the combo at the top giving me a 1in lift in the rear.
A ton of 235/60r15 photos in here with 3.75bs front and back.
https://www.thirdgen.org/forums/whee...er-cobras.html




id like to do the 205 size tire. what size sidewall would look good with that?
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Old 02-24-2015, 12:30 PM
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Car: 1983 Z28
Engine: 385 Fastburn
Transmission: T-5
Axle/Gears: BorgWarner 9-bolt posi, 3.27 gears
Re: what backspacing
Originally Posted by billybob6110
id like to do the 205 size tire. what size sidewall would look good with that?
in order to have a 26" tire on the front in that size you would have to run a 205/70R15.

Why not run 215's up front instead? that's the stock size for a 15x7.
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Old 02-24-2015, 12:40 PM
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Car: 1984 chevy camaro
Engine: 355
Transmission: turbo 350 2800 stall
Axle/Gears: 3:73 detroit locker posi
Re: what backspacing
Originally Posted by RedLeader289
in order to have a 26" tire on the front in that size you would have to run a 205/70R15.

Why not run 215's up front instead? that's the stock size for a 15x7.
I could I just have the 205 tires on my old rims now. if run 215 I would still run a 70 series tire?
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Old 02-24-2015, 12:45 PM
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Car: 1983 Z28
Engine: 385 Fastburn
Transmission: T-5
Axle/Gears: BorgWarner 9-bolt posi, 3.27 gears
Re: what backspacing
Originally Posted by billybob6110
I could I just have the 205 tires on my old rims now. if run 215 I would still run a 70 series tire?
What wheels do you have now?

No, that would be too tall with a 215. You'd run a 215/65R15's (on a 15x7). I run those up front with 275's in the back(on a 15x8). love the way it looks.
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Old 02-24-2015, 02:10 PM
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Car: 1984 chevy camaro
Engine: 355
Transmission: turbo 350 2800 stall
Axle/Gears: 3:73 detroit locker posi
Re: what backspacing
Originally Posted by RedLeader289
What wheels do you have now?

No, that would be too tall with a 215. You'd run a 215/65R15's (on a 15x7). I run those up front with 275's in the back(on a 15x8). love the way it looks.
outlaw 2 wheels. I have 275/60/15 on 15x8 on rear.
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