Tires/wheels

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cuda620

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What’s the largest 15” tire/wheel combo that I can install on a 73 duster rear wit stock spring location and stock fender? Thanks.
 
Small bolt 15x8 4 1/4 back space . Brown car
Big bolt 15x8 4 1/2 back space. Orange car

tires 275 -60- 15

With mini tubbed car

15x12 7 1/2 back space. Orange car last two pictures

tires 29x14.5

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New pics 374.jpg
 
Small bolt 15x8 4 1/4 back space . Brown car
Big bolt 15x8 4 1/2 back space. Orange car

tires 275 -60- 15

With mini tubbed car

15x12 7 1/2 back space. Orange car last two pictures

tires 29x14.5

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What size are the tires with the hotrod photo and the photo with the trailer are they the same size tires.
 
What size are the tires with the hotrod photo and the photo with the trailer are they the same size tires.
They are 29x14.5 Hoosier's on 15x12 inch wheels. 7 1/2 BS, standard width a-body rear, We went to a 28x14.5 and they fit better. A picture with 28's

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On a Duster, yes. As long as you get the wheel centered up with the proper backspace for your car.
when I measured the width of my duster's wheelwell, I got about 12.3" wide to the inside lip of the wheelwell. that lip is about an inch wide, so you could trim or roll it for more clearance. theoretically being super precise on backspacing, wheelwell wise, you should be able to fit up to 295's in a stock wheelwell (12.3"=312mm)
 
when I measured the width of my duster's wheelwell, I got about 12.3" wide to the inside lip of the wheelwell. that lip is about an inch wide, so you could trim or roll it for more clearance. theoretically being super precise on backspacing, wheelwell wise, you should be able to fit up to 295's in a stock wheelwell (12.3"=312mm)

lol.

Sure, as long as body roll isn’t a thing. Or sidewall flex. Or suspension flex.

So no, not even theoretically. Because even theory can calculate how much the sidewall will flex.

Realistically you need a 1/2” for clearance on the quarter side, and not much less than 3/8” on the spring side unless you’re running really low profile tires.
 
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lol.

Sure, as long as body roll isn’t a thing. Or sidewalk flex. Or suspension flex.

So no, not even theoretically. Because even theory can calculate how much the sidewall will flex.

Realistically you need a 1/2” for clearance on the quarter side, and not much less than 3/8” on the spring side unless you’re running really low profile tires.
fair, granted you can probably get another 3/4" by trimming or rolling the quarter panel lip (it's over an inch wide on my car)....run some 20's with 3" sidewalls and an IRS that won't have the side-side flex of leaf springs on shackles then maybe as well....

and if he's only going 1/4 mile at a time in a straight line, I'm guessing you can get away with less clearance as well, since you typically don't have to give as much clearance for lateral movement...
 
fair, granted you can probably get another 3/4" by trimming or rolling the quarter panel lip (it's over an inch wide on my car)....run some 20's with 3" sidewalls and an IRS that won't have the side-side flex of leaf springs on shackles then maybe as well....

and if he's only going 1/4 mile at a time in a straight line, I'm guessing you can get away with less clearance as well, since you typically don't have to give as much clearance for lateral movement...
Well i have the tires on 295 65 15 and i did roll up the lip but i did not really need to because the the fender sit above the tire like the 275 60 15s did , I do have shackles on it . To this point so far and from what i have done I have not had any issues.

If you have soft suspension in the back and want your back end to squat then stock wheel wells may need to be modified. As for me this is how i have had my car for a while so it does not bother me.

I know radial do not grow like a bias slick and I think the 265 is really a 29.5 but I have not check the true numbers on that even though they say those tires are 30.

17's and 15's
 
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