Ummm.....tire question

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steel1212

Active Member

Jun 24, 2004

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36

Frankfort, Ky

Aug 26, 2005

#1

• Aug 26, 2005

• #1

235/60/15
Width.................9.25" (235.00mm)
Sidewall height..... 5.55" (141.00mm)
Overall height ......26.10" (663.00mm)
Circumference .....82.00" (2082.88mm

275/50/15
Width ................10.83" (275.00mm)
Sidewall height ....5.41" (137.50mm)
Overall height .....25.83" (656.00mm)
Circumference ....81.14" (2060.88mm)

Diffrence
Width ................+1.57" (+40.00mm) 275 wider
Sidewall height ....-0.14" (-3.50mm 275 sidewall shorter
Overall height ......-0.28" (-7.00mm) 275 height shorter
Circumference .....-0.87" (-21.99mm) 275 circumference smaller

What backspacing and wheel size would I need to get this 275/50/15 to work on my 65? According to this thing its actually about a 1/4 shorter than the 235/60/15s I'm running now. I'm thinking I would need an 8 inch rim with about 4" of backspacing? I want it tucked in as far as possible with out rubbing the spring. I have racing shackles so that SHOULD allow me to have it stick out of the wheel well a little with out rubbing during accelerations.

Will this work or am I dreaming?

 

dodgestang

Active Member

Dec 15, 2003

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37

Cecil County, MD

Aug 26, 2005

#2

• Aug 26, 2005

• #2

Distance between metal contact points on both sides of the rim/tire in the rear: about 10.25 inch

 

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steel1212

Active Member

Jun 24, 2004

1,180

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36

Frankfort, Ky

Aug 26, 2005

#3

• Aug 26, 2005

• #3

between fenderlip and inside wheel well? My tire does not sit up in there but rather below the lip about 1.5 inches due to the shackles moveing them down. I figure I'm dreaming and stuck with the 235s huh?

 

Alarus

New Member

Apr 29, 2005

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Az

Aug 26, 2005

#4

• Aug 26, 2005

• #4

i dont know the differance but i fit 255/60r15's on the back and 235/60R14's on the front my 73 and i like the look, and i think i can even go a little bigger on the back when i get new leafs for it, but i dont know the diff in back space between the two years(dout this helps any but if it dose great)

 

iskwezm

10 Year Member

May 24, 2005

4,159

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79

Rowland Heights,California

Aug 26, 2005

#5

• Aug 26, 2005

• #5

i have 17X8's with 4 3/4 BS,but i think 5" would work better

 

S

steel1212

Active Member

Jun 24, 2004

1,180

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36

Frankfort, Ky

Aug 26, 2005

#6

• Aug 26, 2005

• #6

Alarus said:

i dont know the differance but i fit 255/60r15's on the back and 235/60R14's on the front my 73 and i like the look, and i think i can even go a little bigger on the back when i get new leafs for it, but i dont know the diff in back space between the two years(dout this helps any but if it dose great)

Click to expand...

Thanks for trying but I think your land yachet has a lot more room in the back than mine does.

 

Alarus

New Member

Apr 29, 2005

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Az

Aug 26, 2005

#7

• Aug 26, 2005

• #7

yeah thats kinda what i thought

 

65up2d8

Member

Mar 30, 2005

281

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17

Memphis, TN

Aug 26, 2005

#8

• Aug 26, 2005

• #8

I think it is quite possible as Iskwezm indicated. You will, IMO, have to roll your rear quarters. You definitely need 4.75" or 5" backspacing. As Iskwezm also said, I think 5" backspacing will probably work, but I can't say that with certainty.
I rolled my rear fenders, and I'm currently (notice I said currently; 17's and/or 18's are planned) running a BFG Radial 265/50-15 on an 8" Centerline Billet Star wheel. I do have some rubbing over really serious bumps, but there are reasons for that rubbing. First, when I rolled the fenders, I also installed a Lincoln Versailles 9" rearend, which is 1/2" wider on each side and effectively gave me 4.25" backspacing. Second, I'm running reverse eye five leaf springs, so my ride height is pretty low. Accordingly, I think 275's will be fine with rolled quarters, the right back spacing, and the proper ride height for what you're trying to do.

 

iskwezm

10 Year Member

May 24, 2005

4,159

20

79

Rowland Heights,California

Aug 27, 2005

#9

• Aug 27, 2005

• #9

I have the 1 1/2 lowered leafs that are about 20 years old that my dad put on the car and I cant tell if their sagging or not,but if I had 1/2" more height i think it would be fine,it barely rubs now.

 

12sec67

Active Member

Oct 6, 2003

1,301

1

36

San Diego, Ca

Aug 27, 2005

#10

• Aug 27, 2005

• #10

275/50/15 is a 10" wide tire on an 8" rim, so you have a little sidewall bubble. it does look cool though, i used to run nitto and BFG drag radials that size on my stang with my 67 with 4 1/4" backspacing but on a shorter rear end.

 

S

steel1212

Active Member

Jun 24, 2004

1,180

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36

Frankfort, Ky

Aug 27, 2005

#11

• Aug 27, 2005

• #11

As far as I can tell welds only come in 4.5 and 5.5 backspacing for 15" So now I'm looking at other wheels. These need to be light weight drag wheels as I plan on haveing 17x8 Hopsters in the future for the street. Anybody have any ideas?

Also anybody know of a place that will test fit wheels and tires?