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Discussion Starter #1
71 Nova, stock (I think)

I know this topic has been beaten to death but I can only do so much searching and there's no definitive answer. I bought a set of rims off eBay

Fronts- 15x7 3.75 b/s, hoping for a 215/60r15 tire

Rear- 15x8 4.5 b/s, hoping for a 235/60r15 tire


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Does this sound doable? Do I need to modify something on the car? Should I get 15x7 4.5 b/s for the rear? Should I switch to a 225 for the rear?

I'm willing to change things or upgrade. Please help!
 

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i can't be sure on the front set up but back you'll likely be good. as i run a 235 60 15 with a 4 1/8'' BS on a stock 66. an the back rally wheel is 7'' wide an you said yours are 8'' wide.
 
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Discussion Starter #3
Oh gosh. I hope the front isn't a problem. I've been worrying about the back this whole time.
 

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Mike - 74 Nova Baltimore, MD
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71 Nova, stock (I think)
Fronts- 15x7 3.75 b/s, hoping for a 215/60r15 tire
Rear- 15x8 4.5 b/s, hoping for a 235/60r15 tire
Should I get 15x7 4.5 b/s for the rear? Should I switch to a 225 for the rear?
I think the 3.75 b/s on the front 15x7 wheels may not be enough b/s... your tires may rub on the inside portion of the wells towards the fender. I run 4.25" of b/s on the front of my 74 Nova with 16x7 wheels with a 225/16/50 tire (with stock disc brakes).

If it was me... For the rear wheels, I would go with the 15x7 wheels with the 4.5 b/s and go with the 235/60r15 tire (I think you would be able to go up to a 255 wide tire with this wheel on the rear without any rubbing).

The 15x7 with the 4.5 b/s would center the wheel within the wheel well better then the 15x8 with the same b/s (with a stock Nova rear end). The 15x8 (with 4.5 b/s) is going to put the wheel/tire combo closer to the quarter panel.
 

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My 71 I run 15x7 front with 4" backspacing on factory disc brakes. Rear is 15x8 with 5 inch backspacing. A 235 tire will fit better on a 15x7 rim. If you run 15x7 in rear I think 4 inch backspacing would work better. I run 235/60 front and 255/60 rear tires.
 

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Mike - 74 Nova Baltimore, MD
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My 71, I run 15x7 front with 4" backspacing on factory disc brakes. Rear is 15x8 with 5 inch backspacing. A 235 tire will fit better on a 15x7 rim. If you run 15x7 in rear I think 4 inch backspacing would work better. I run 235/60 front and 255/60 rear tires.
If I am doing the math correctly, a 15x8 wheel with 5" backspacing would be equal in offset to a 15x7 wheel with 4.5" backspacing. Both of these wheels would have a 13mm offset (a 4" b/s on a 15x7 wheel would have 0 offset).
 

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Discussion Starter #8
Maybe I'll just have to sum these rims up to a loss and start from scratch. This is what I get from listening to a guy from eBay.
 

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I don’t know 3rd gen cars as intimately as I do my 1st gens but this forum has had a strong base of information as sharing with the community here. NPHNP..

There are over 430 posts in this thread which I’m sure will reveal the specifications you seek..
 

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Mike - 74 Nova Baltimore, MD
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The highest backspacing I can get in 15x7 is 4.25.
If you are going to run 215/60r15 tires on the front wheels and 235/60r15 tires on the rear wheels... the 15x7 wheels with the 4.25" backspacing should be fine.

Unfortunately, custom made wheels are sometimes required to obtain the exact backspacing needed to fit the widest tire that can fit within the wheel wells. I never understood why more wheel manufacturers did not produce stock wheels that were 7" wide with a 4.5" b/s ... and 8" wide wheels with a 5" b/s.
 

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I think your front setup will work, the wheel sticks out a little farther than my 15x7 4.25" BS, but your tire is narrower than my 235/60-15, so the outer tire will sit in about the same place.

The rear might work. I fit a set of 17x8 4.5" BS American Racing Torq Thrusts on my car with 255/50-17 tires. They sat really close to the quarter lip. The ideal backspacing would be 4.75" or 5" on an 8" wheel IMO.

The big question is what suspension setup do you have? Are you lowered 3-4", stock height, somewhere in between? Do you have original drum brakes, original disc brakes, or an aftermarket kit? Those front wheels will probably be hitting the fender with stock disc brakes.
 

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Discussion Starter #13
I think your front setup will work, the wheel sticks out a little farther than my 15x7 4.25" BS, but your tire is narrower than my 235/60-15, so the outer tire will sit in about the same place.

The rear might work. I fit a set of 17x8 4.5" BS American Racing Torq Thrusts on my car with 255/50-17 tires. They sat really close to the quarter lip. The ideal backspacing would be 4.75" or 5" on an 8" wheel IMO.

The big question is what suspension setup do you have? Are you lowered 3-4", stock height, somewhere in between? Do you have original drum brakes, original disc brakes, or an aftermarket kit? Those front wheels will probably be hitting the fender with stock disc brakes.
Everything seems to be stock with drum brakes all around.
 

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I have 235/60/15 on all 4 corners on 88 Monte SS rims. 1970 Nova
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