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View Full Version : non mini tub backspacing?

68FBODY
02-17-2009, 04:14 PM
trying to decide what backspacing is needed for a 9-9.5" rear wheel on a 1968 pontiac firebird with stock wheel wells in the rear. I believe the pontiac 8.2 firebird rearends were also 1" wider than the camaro. anybody even run 9-9.5" rear on their camaro without tubbing?
ProdigyCustoms
02-17-2009, 04:58 PM
Yes you can fit a 9.5 and a 275 tire no problem, but we need to measure your rear then we can do the backspacing.

Measure mounting hub to mounting hub (brake drum / rotor to brake drum / rotor) and let me know
68FBODY
02-17-2009, 05:41 PM
just pm'd you, but i just measured 61 1/4"
ProdigyCustoms
02-17-2009, 06:08 PM
So it is 1" wider, so you need a 6" BS on a 9.5. What kind of wheels are you looking at?
68FBODY
02-17-2009, 06:42 PM
intro 5 spoke possibly, and will that 6" stick out past the rear quarter?
ProdigyCustoms
02-17-2009, 06:46 PM
You better triple verify the BS with them and get it signed!
68FBODY
02-17-2009, 06:50 PM
You better triple verify the BS with them and get it signed!

AWESOME! THANK YOU!
arrowem
02-21-2009, 04:46 AM
I can let you know Monday or Tuesday about the backspacing because I also have a 68 Firebird with stock rear and want to put 275's on the back. I ordered some wheels with 17x9.5 with 5.75 BS and they are supposed to arrive Monday. I also got 17x8 with 4.0 for the front and want to run 245's . I want to mount them both before I order the tire to make sure what will fit. Jason
ProdigyCustoms
02-21-2009, 04:01 PM
I can let you know Monday or Tuesday about the backspacing because I also have a 68 Firebird with stock rear and want to put 275's on the back. I ordered some wheels with 17x9.5 with 5.75 BS and they are supposed to arrive Monday. I also got 17x8 with 4.0 for the front and want to run 245's . I want to mount them both before I order the tire to make sure what will fit. Jason


Jason, your in trouble on the fronts for sure, and maybe on the rear also. On a 8" front you need a 4.75 backspace
arrowem
02-23-2009, 02:20 PM
ProdigyCustoms, I wish I would have known that before I ordered, I even had a wheelrite to show me the fit.....sigh....you were right.
Well my choices are (for the front) 8 with 4.5 BS or 7 with 3.5 BS , the backs are perfect.
Jason

if at first you don't succeed spend more money
ProdigyCustoms
02-24-2009, 09:27 AM
Next time your doing something like this give me a call.