Wheel Size Opinions Please - Team Camaro Tech
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post #1 of 17 (permalink) Old Jul 23rd, 13, 07:41 PM Thread Starter
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Wheel Size Opinions Please

Hi all. I found a great deal locally for some rally wheels and tires for my '67 that I'm going to check out tomorrow, but wanted to see what you all thought in terms of fit.

First off, the wheel/tire size for the front is a 215/65/15 on a 7" rim, and the rear is a 235/60/15 on an 8" rim. Anyone know how this would look? I'm looking for a combo that will be close to the wheel well in the front and rear without extending out, but at the same time, not too skinny/wimpy either. Backspacing is 4" on the 7" wheels and 4.5" on the 8" wheels.

My front springs seem a little worn and may have dropped the front end about 3/4", but I'm going to be getting new springs and shocks at the time of install, so it should be close to factory.

I had originally thought of having 255/60/15's on the back, and just going 15x7 all the way around, but this is such a good deal, I wanted to consider it for a moment.

Any opinions would be appreciated.
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post #2 of 17 (permalink) Old Jul 23rd, 13, 08:25 PM
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Re: Wheel Size Opinions Please

Here is a pic of mine with rally wheels. 15x7 in the front with 215/65 and rear 15x8 245/60 tires. I don't have a better pic from behind to show you the width.

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post #3 of 17 (permalink) Old Jul 23rd, 13, 08:34 PM Thread Starter
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Re: Wheel Size Opinions Please

Thanks for the pic Brian. Are those Corvette rallys? Not sure that it matters, but the one's I'm looking at are.
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post #4 of 17 (permalink) Old Jul 23rd, 13, 08:35 PM
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Re: Wheel Size Opinions Please

An 8" wheel really should have 4.75" of backspacing to center the wheel and tire in the fender well. 4.5 backspacing puts the tire 1/4" closer to the fender lip but will work if you don't go too wide. The 7" wheel ideally will have a 4.25" backspacing. 4" backspacing will put the tire 1/4" closer to the fender lip than the inner fender as well.

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post #5 of 17 (permalink) Old Jul 23rd, 13, 08:44 PM
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Re: Wheel Size Opinions Please

Quote:
Originally Posted by DjD View Post
An 8" wheel really should have 4.75" of backspacing to center the wheel and tire in the fender well. 4.5 backspacing puts the tire 1/4" closer to the fender lip but will work if you don't go too wide. The 7" wheel ideally will have a 4.25" backspacing. 4" backspacing will put the tire 1/4" closer to the fender lip than the inner fender as well.
Does the above backspacing apply to a 69 as well?

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post #6 of 17 (permalink) Old Jul 24th, 13, 12:49 AM Thread Starter
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Re: Wheel Size Opinions Please

Quote:
Originally Posted by DjD View Post
An 8" wheel really should have 4.75" of backspacing to center the wheel and tire in the fender well. 4.5 backspacing puts the tire 1/4" closer to the fender lip but will work if you don't go too wide. The 7" wheel ideally will have a 4.25" backspacing. 4" backspacing will put the tire 1/4" closer to the fender lip than the inner fender as well.
Thanks Dennis. With the stated BS, what sized tire on front or back would you reccommend to meet the lip but not exceed the wheel well?
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post #7 of 17 (permalink) Old Jul 24th, 13, 09:17 AM
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Re: Wheel Size Opinions Please

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Originally Posted by NH69Z28RS View Post
Does the above backspacing apply to a 69 as well?
More so because of the squared off wheel opening...

Quote:
Originally Posted by cv2065 View Post
Thanks Dennis. With the stated BS, what sized tire on front or back would you reccommend to meet the lip but not exceed the wheel well?
The tire sizes and wheel backspacing you stated should probably work without issue, they are fairly safe width and height. I ran 235/60 15 fronts on 15x7 with 4.25bs on my '69 years ago.

Is there a reason or look you are after with 2 different wheel and tire sizes front and back? There is less than an inch in section width and about 1/2" in tread width between the 2 sizes.

...Dennis

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post #8 of 17 (permalink) Old Jul 24th, 13, 10:01 AM
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Re: Wheel Size Opinions Please

I have a '67 Camaro and I believe it has the stance/look you are after.

Hotchkiss 2 inch SB drop springs (NOT spindles).

Front: 2 x 15x7 w/4.25 factory FW rims with 235 60R 15 tires.
Back: 2 x 15x8 w/4.50 backspacing (NOT Corvette AZ rims, but aftermarket from one of the Camaro suppliers) with 245 60R 15 tires.

The 235s in front and 245s out back fit square on the rims with no hourglass squatted sidewall. You CAN fit larger size tires out back (255 on up), but it'll have the squatted tire look. There is NO issue with tire/fender fitment with this setup.

I guess the only follow-up question would be what do you have for brakes?
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post #9 of 17 (permalink) Old Jul 24th, 13, 10:32 AM
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Re: Wheel Size Opinions Please

I like the steam roller look
here is a picture of mine with 8"wheels on the front with 215 65r 15 and 10" wheels with 295 50 r 15 on the rear
the rear tires do go beyond the fenders an 1.5",
both wheels if I remember have a 4" back space but no rock chips as of yet from the rear , but I do have some chips from the front tires
oh well its a driver, NOT A SHOW QUEEN

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post #10 of 17 (permalink) Old Jul 24th, 13, 12:29 PM Thread Starter
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Re: Wheel Size Opinions Please

Thanks for the replies guys. I thought that it would be a pretty 'safe' size combo, but wanted to be sure that it wasn't that safe. Right now, from a previous owner, I have 215/70/15's on the front (4" BS), and 235/70/15's on the back (5" BS). The rears don't stick out of the fender lip, but still look a little too 'dragster' for my taste.

I had originally thought about 15x7's all the way around, but have seen others use 8's on the rear, and then this deal came along.

Also, I forgot to mention that the set I'm looking at are originally Corvette Rallys. Does that make a difference, or is BS the same from rally to rally?

Thanks.
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post #11 of 17 (permalink) Old Jul 25th, 13, 03:53 AM
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Re: Wheel Size Opinions Please

The Vette wheels work fine. I have 245-60 and 225-60 on my 69 and it looks great and does not stick out and the tires don't look too big and no rubbing issues. I have the flat caps that give a deeper wheel look.
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post #12 of 17 (permalink) Old Jul 25th, 13, 05:00 AM
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Re: Wheel Size Opinions Please

Quote:
Originally Posted by cv2065 View Post
Thanks for the replies guys. I thought that it would be a pretty 'safe' size combo, but wanted to be sure that it wasn't that safe. Right now, from a previous owner, I have 215/70/15's on the front (4" BS), and 235/70/15's on the back (5" BS). The rears don't stick out of the fender lip, but still look a little too 'dragster' for my taste.

I had originally thought about 15x7's all the way around, but have seen others use 8's on the rear, and then this deal came along.

Also, I forgot to mention that the set I'm looking at are originally Corvette Rallys. Does that make a difference, or is BS the same from rally to rally?

Thanks.
Confused. I thought you said that you found a smoking deal on a pair of 7 inch wheels for the front and 8 inch wheels for the back. Now you say they are Corvette Rallys. What year Corvette? 15 x 8 from a 1968-1982 are going to have 4 inches of backspacing. 15 x 7's from earlier Vettes are going to have 3.5 inches of backspacing.
If those 8 inch rallys have 4.5 backspacing, they are aftermarket. No rally wheel came out of the factory with 4.5 inches of backspace. They should fit and look fine in the back. Sounds like your 7's are Camaro rallys and again should fit and look good as that was the factory wheel for a Camaro.
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post #13 of 17 (permalink) Old Jul 25th, 13, 06:12 AM Thread Starter
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Re: Wheel Size Opinions Please

Quote:
Originally Posted by cool rocking daddy View Post
Confused. I thought you said that you found a smoking deal on a pair of 7 inch wheels for the front and 8 inch wheels for the back. Now you say they are Corvette Rallys. What year Corvette? 15 x 8 from a 1968-1982 are going to have 4 inches of backspacing. 15 x 7's from earlier Vettes are going to have 3.5 inches of backspacing.
If those 8 inch rallys have 4.5 backspacing, they are aftermarket. No rally wheel came out of the factory with 4.5 inches of backspace. They should fit and look fine in the back. Sounds like your 7's are Camaro rallys and again should fit and look good as that was the factory wheel for a Camaro.
Thanks for the feedback Chet. You raise a good question, as I go out to see the wheels/tires today. Not sure exactly what year the wheels/tires are from as of yet, but here's the local ad. You may be able to tell by looking.

http://treasure.craigslist.org/pts/3948827057.html
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post #14 of 17 (permalink) Old Jul 25th, 13, 06:19 AM
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Re: Wheel Size Opinions Please

Can't tell from the ad. Call the guy and ask but I'll bet he doesn't know either. Take a flat edge or board long enough to span the wheel, not the tire, and a ruler and measure the backspace. Like I said, if the 8" wheel is 4.5, it's aftermarket and must be balanced for a lug centric wheel.

Hubcentric or lug centric is no big deal, just make sure its balanced correctly. Most factory wheels are NOT hubcentric anymore and almost all aftermarket wheels are not or ever were hubcentric.
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post #15 of 17 (permalink) Old Jul 25th, 13, 02:59 PM Thread Starter
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Re: Wheel Size Opinions Please

Well, I decided to pass. I've got to get a little body work done anyway, so I'll know better what I have left to spend on wheels/tires.

Plus, I wanted a little different look, where there was more differentiation between the front and backs to create a very small rake. As it stands right now, the car has about a 2" difference in tire height from front to back. As Dennis pointed out, there really is no difference with this setup and it would flatten out the car for the most part.

Thanks again for the comments. I learned a few more things. By the way, I did speak to the owner, and he told me that the tires originally came off of a '69 Vette, so he may not have really known what the backspacing was to begin with based on what Chet was saying.
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