Backspacing (talk to me dodgestang :)

sixtyfive · Sep 8, 2007

I still have not made my decision between 16 or 17 inch Cobra R wheels on my 65 but after contemplating over dodgestangs wonderful chart for awhile I have a question about backspacing.

For example since my suspension is 100% stock and I decide to go with 17x8 late model mustang wheels I would ideally like to have 4.75 inches of backspacing

My question is what do most of the late model mustang wheels have for a backspacing? (95 or 2k Cobra-R, Bullits, etx.)

I am also seriously considering doing the shelby drop, there are really no negatives to doing this are there?

Thanks

Grabber70Mach · Sep 9, 2007

I think that the 99-04 mustangs rims run a 17x8 with a 30mm offset. Check out this site it explains offset to backspace.

http://www.vintagevenom.com/mustange-disc-brake-conversion-kit-faq.htm

DukeGnarley · Sep 9, 2007

no real down side to the shelby drop and it's almost free (some scrap metal for a template and a correct size drill).

dennis112 · Sep 9, 2007

The drop does have one down side--it is somewhat detrimental to a drag car. Otherwise, do the 1" drop and enjoy the benefits of good handling.

dodgestang · Sep 9, 2007

IIRC the BS on those wheels is 6'' which means you would want a 1.25 inch adapter to fit them by bringing their specs to 4.75 for a 17x8 wheel, but don't take that as gospel, either measure the wheels yourself or validate the backspacing from a second source because the backspacing on late model wheels seems to change a lot from year to year.

sixtyfive · Sep 9, 2007

Thanks for the info, ill be sure to ask before buying and i could probably check my buddies cobra because he has the same wheels I want on it, or even try em on once i get some spacers. Ive seen some pretty pricey wheel adaptors/spacers out there, whats a good price on a set of 4?

tweet66 · Sep 10, 2007

The backspacing on my Cobra R's is 5.75". I'm running 1" adaptors that I bought of Ebay for $110 for 4. Looks good but I'm probably going to switch to Bullitts or Mach 1 rims in the near future.

sixtyfive · Sep 10, 2007

tweet66 said:
The backspacing on my Cobra R's is 5.75". I'm running 1" adaptors that I bought of Ebay for $110 for 4. Looks good but I'm probably going to switch to Bullitts or Mach 1 rims in the near future.

Could I see some pictures of your car with those wheels on it? what size are they?

BlwnGazkit · Sep 10, 2007

05-07 wheels run with 6.29" of Backspace. With a 1.5" adaptor it leaves just a little more than 1/8" between the rim and the edge of the UCA on a stock setup.

geostang351 · Sep 10, 2007

sixtyfive said:
Thanks for the info, ill be sure to ask before buying and i could probably check my buddies cobra because he has the same wheels I want on it, or even try em on once i get some spacers. Ive seen some pretty pricey wheel adaptors/spacers out there, whats a good price on a set of 4?

Would love to see pics of your buddies car with those wheels on!

I looked into these same wheels about two years ago and from what I remember, they didn't sell the 17" rims in 8" width in CHROME. They had 9.5" though. Are you looking to get aluminum or other in this size? I'm curious as those cobra rims are SWEET!

tweet66 · Sep 10, 2007

sixtyfive said:
Could I see some pictures of your car with those wheels on it? what size are they?

I can take some pics of the wheels and tires, 235/45R17 front & 255/45R17 rear, and some pics of the adaptors but everythings off the car right now for a T5 swap, some suspension upgrades, and the new Bullitts that I just bought 15 minutes ago!

sixtyfive · Sep 10, 2007

geostang351 said:
Would love to see pics of your buddies car with those wheels on!

I looked into these same wheels about two years ago and from what I remember, they didn't sell the 17" rims in 8" width in CHROME. They had 9.5" though. Are you looking to get aluminum or other in this size? I'm curious as those cobra rims are SWEET!

Sure, i diddnt mention that it is a 2000 cobra and he has the black chrome cobra r's that he uses for his drag tires, and regular chrome cobra r's for his street tires.

tweet66 said:
I can take some pics of the wheels and tires, 235/45R17 front & 255/45R17 rear, and some pics of the adaptors but everythings off the car right now for a T5 swap, some suspension upgrades, and the new Bullitts that I just bought 15 minutes ago!

Does this mean you want to sell me the cobra r's? are they chrome?

sixtyfive · Sep 10, 2007

View attachment 364243

View attachment 364245

View attachment 364247

There they are... the ******* can fit 10.5 wide with no modifications

geostang351 · Sep 10, 2007

Hold a sec. You're telling me this thread is in regard to a late model??? I got excited that the Cobra R's in Chrome where made in a width to fit in a classic ('68), then you show me a picture of a white late model. I think I'm going to cry.

tweet66 · Sep 10, 2007

sixtyfive said:
Does this mean you want to sell me the cobra r's? are they chrome?

We might be able to work out a dealThey're silver paint or powder coat, not sure but definietly factory Ford pieces.

sixtyfive · Sep 10, 2007

geostang351 said:
Hold a sec. You're telling me this thread is in regard to a late model??? I got excited that the Cobra R's in Chrome where made in a width to fit in a classic ('68), then you show me a picture of a white late model. I think I'm going to cry.

I am looking to put chrome cobra r's on my 65, they make cobra r wheels in 16x7 16x8 17x7 17x8, all of which will fit on our old mustangs. His front ones are 17x7 on that 2000.

As for pictures all I have seen is this mustang, which has the silver ones

tweet66 · Sep 10, 2007

Those are exactly what I have

geostang351 · Sep 11, 2007

sixtyfive said:
I am looking to put chrome cobra r's on my 65, they make cobra r wheels in 16x7 16x8 17x7 17x8, all of which will fit on our old mustangs. His front ones are 17x7 on that 2000.

As for pictures all I have seen is this mustang, which has the silver ones

That makes sense looking at this car, however IIRC they do not have those same wheels in chrome in those sizes correct?

sixtyfive · Sep 11, 2007

There are 17x8 (replica)
http://cgi.ebay.com/ebaymotors/AFS-94-04-Mustang-Cobra-R-17x8-Wheels-Chrome_W0QQcmdZViewItemQQcategoryZ43957QQihZ013QQitemZ230170529713QQrdZ1QQsspagenameZWDVW
There are 16x8 (replica)
http://cgi.ebay.com/ebaymotors/16-Mustang-Cobra-R-Replica-Chrome-Wheels-Rims_W0QQcmdZViewItemQQcategoryZ43956QQihZ015QQitemZ250078517125QQrdZ1QQsspagenameZWD1V

im pretty sure ive seen the 17x7's in regular chrome, but I am not able to find them now

The prices on those are set quite high, ive seen em go for that price with tires new

Backspacing (talk to me dodgestang :)

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