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Will this tire combo work?
#1
THis is for stock steel 7" rims with hub caps. 

Will 275/60/15's fit on the back under the fender wells?  If not what is the max size I can go with?    275/60/15

Will 255/60/15's fit on the front without rubbing?  If not what is the max size I can go with? 255/60/15

Thanks!
Wade
1972 Mach 1 351 cj 4speed
"We confide in our strength, without boasting of it; we respect that of others, without fearing it."--Thomas Jefferson

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#2
Someone correct me if I am wrong but I do not think a 275 tire will fit a 7" rim. If you were able to get it to fit it would not be something that I would consider safe. 255 is pushing it.

'73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

'73 F code convertible. Bright red. Needs total restore. (IE HOT MESS)

- Jason
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#3
I just happen to have a tire sizing chart for BFG TA's as I'm in process of ordering new tires for my car.
For the 15" rims the 255-60-R15 minimum wheel width shows 7", rim width range 7-9"
For the 275-60-R15, the rim width range is 7.5 -9.5".
In other words you're going to be tight. You might consider going a bit smaller, 245-60-R15 front and 255-60-R15 back, but even they are going to look a bit "ballooned" on the rims. The rim widths respectively are 7- 8.5" and 7- 9" for those sizes.
My car had 235-60 R14's on 7" fronts and 245-60-R14' s on 7" backs and they looked bulged. I needed to buy new Magnum 500's, so I got 8's for the back and they look much better.
Geoff.

I learn something new every day!
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#4
According to Summit the minimum recommended rim width for that tire is 7.5"

It has been reported by numerous members that a 275 tire on an 8 inch rim with 4.5" backspacing fits on the rear but I have not personally run that combo.

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
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#5
A 275 will fit on a 7" rim. It's not ideal, but it'll fit.

255s fit fine on a 7" rim in the front, only issue I ever had was the tire might rub by the steering box bolts at full lock on a LH turn into a parking lot.


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#6
so it looks like there iisnt another tire size between 255 60 15 and 275 60 15.

So I guess 245 60 15's front 255 60 15's back???
What is the difference in tread width between front and rear?
Will this setup look good? I really want bigger in the back.

Thanks!
Wade
1972 Mach 1 351 cj 4speed
"We confide in our strength, without boasting of it; we respect that of others, without fearing it."--Thomas Jefferson

  Reply
#7
You can use the spreadsheet in this thread to get the total width and approximate tread width (varies by manufacturers)
https://www.7173mustangs.com/thread-tire...#pid115406



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#8
You would have a little over 1/4" difference in tread width.

'73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

'73 F code convertible. Bright red. Needs total restore. (IE HOT MESS)

- Jason
  Reply
#9
(02-26-2019, 03:32 PM)73pony Wrote: You would have a little over 1/4" difference in tread width.

So really for that I might as well go same size all the way around.  You're not going to be able to see 1/4" difference.  Basicaly unless I take the chance on the 275's on the rear I'm not going to get the look I want.  

Thoughts??

Thanks!
Wade
1972 Mach 1 351 cj 4speed
"We confide in our strength, without boasting of it; we respect that of others, without fearing it."--Thomas Jefferson

  Reply
#10
(02-26-2019, 02:52 PM)scgamecock Wrote: so it looks like there iisnt another tire size between 255 60 15 and 275 60 15.  

So I guess 245 60 15's front 255 60 15's back???  
What is the difference in tread width between front and rear?  
Will this setup look good?  I really want bigger in the back.

Click on the "specs" tab, it'll give every dimension you need to know about a tire. 

https://www.tirerack.com/tires/tires.jsp...dial+G%2FT


245 FRT / 255 Rear would work fine.


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