limegreen70
Pokorny Enterprise's
To Get a pair on a Duster, I take it Mini tubs will have to be Had? Or could i just move the Leaf springs in?
295/55/15s
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AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
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For sure the leafs need to be flush with the inner tub walls.
295s are about an 11.6 section width on an 8 inch rim. But 295s on 8s are too narrow for any kind of handling or tread longevity. Tens are a minimum, and they will still want to be down at 24 psi. 295s will only have traction for a few thousand miles and only during the first summer.
So on a 10 inch rim the section width is likely to be about 12.3. and you need a minimum of 1/2 inch clearance to the inner tubwall, if you like to corner at stock or higher ride height.
So if you put SS springs under that Duster, you can probably fit those 295s on tens under the car, but the sidewalls will definitely not be in the tubs. You will also need a custom bs or a narrowed rear to make it happen.
But if you already have the SS springs, they can do a pretty good job of making 275s hook, which will fit in the tubs. They just don't look as awesome. But they will run on 8s, and last, and you can lower the car down over them and attack corners. Plus there is a better selection of stickier rubber in the 275 size.
But 275s won't help you when you get too deep in the corner,and the back starts coming around; so try not to let that happen! When these 108wb cars start sliding, there's a thin line between having great fun, and wiping out! You need mo powah! Scotty.So you can control the slide with the gas pedal. Teeners need not apply, unless they got decent gears,a real nice TC, and a DPcarb. A small-cam 360, and a 4speed, make for miles of smiles.
295s are about an 11.6 section width on an 8 inch rim. But 295s on 8s are too narrow for any kind of handling or tread longevity. Tens are a minimum, and they will still want to be down at 24 psi. 295s will only have traction for a few thousand miles and only during the first summer.
So on a 10 inch rim the section width is likely to be about 12.3. and you need a minimum of 1/2 inch clearance to the inner tubwall, if you like to corner at stock or higher ride height.
So if you put SS springs under that Duster, you can probably fit those 295s on tens under the car, but the sidewalls will definitely not be in the tubs. You will also need a custom bs or a narrowed rear to make it happen.
But if you already have the SS springs, they can do a pretty good job of making 275s hook, which will fit in the tubs. They just don't look as awesome. But they will run on 8s, and last, and you can lower the car down over them and attack corners. Plus there is a better selection of stickier rubber in the 275 size.
But 275s won't help you when you get too deep in the corner,and the back starts coming around; so try not to let that happen! When these 108wb cars start sliding, there's a thin line between having great fun, and wiping out! You need mo powah! Scotty.So you can control the slide with the gas pedal. Teeners need not apply, unless they got decent gears,a real nice TC, and a DPcarb. A small-cam 360, and a 4speed, make for miles of smiles.
Nope. You don't need mini-tubs.
I run 295/35/18's on my Duster on 18x10's. The springs have a 1/2" offset, and I trimmed the quarter lip back about a 1/2". Section width is 12". And I'm lowered, so, if you're running SS springs it really won't be an issue.
Pictures of the trim on the quarter lip
Tires from the rear 3/4, you can see they're inside the quarters (at the top anyway where they go into the wheel tubs) and not sticking out '70's drag style with big arched springs.
Ride height, sits pretty low
The only thing I think you might have to do is move the axle back a smidge because of the tire height. A 295/55/15 should be like 27.8" tall, so, you may need to center the axle in the wheel opening. The oval track springs I run have a longer front section that does this, but from the factory the axle was closer to the front of the wheel opening than the rear. But the wheel tubs on my car are stock. As for the backspacing and axle width you'd need, that's a different story. 15's have a pretty limited selection for backspacing that will work for you, you may have to go custom on the rims, or on the axle width. With my 18's it was easy, I have off the shelf rims and a wider 68-70 B body 8 3/4.
I run 295/35/18's on my Duster on 18x10's. The springs have a 1/2" offset, and I trimmed the quarter lip back about a 1/2". Section width is 12". And I'm lowered, so, if you're running SS springs it really won't be an issue.
Pictures of the trim on the quarter lip
Tires from the rear 3/4, you can see they're inside the quarters (at the top anyway where they go into the wheel tubs) and not sticking out '70's drag style with big arched springs.
Ride height, sits pretty low
The only thing I think you might have to do is move the axle back a smidge because of the tire height. A 295/55/15 should be like 27.8" tall, so, you may need to center the axle in the wheel opening. The oval track springs I run have a longer front section that does this, but from the factory the axle was closer to the front of the wheel opening than the rear. But the wheel tubs on my car are stock. As for the backspacing and axle width you'd need, that's a different story. 15's have a pretty limited selection for backspacing that will work for you, you may have to go custom on the rims, or on the axle width. With my 18's it was easy, I have off the shelf rims and a wider 68-70 B body 8 3/4.
Food for thought. My dad ran L60 14s on his duster. 10 in rim hardly any back spacing. Now he had air shocks on it. Remember the red duster randy had ? That was my dads in the late 80s L 60 14s were a very wide tire back then but short. If I knew how to scan pictures & post them, I have some pictures of it when my dad had it. It was silver then
An L60 14 had a section width just over 11" wide and was about 27" tall (not that short!). Basically a 275/60/14. It would have been a bit narrow for a 10" wide rim, and with "hardly any" backspacing it was probably even with or stuck out past the quarter. But that's not an issue with air shocks, since there would have been very little suspension travel and the car probably sat pretty high in the back.
You can fit a 275 on a Duster/Dart Sport/Demon without any modifications at all even on a lowered car. Springs in the stock location, no trimming on the quarter lip (unless the axle isn't centered well). Just have to get the backspacing right, and that depends on what axle you've got. SBP A body 8 3/4's are wider than BBP 7.25's and 8.25's, and of course an A-body 8 3/4 with BBP axles is wider still. A 275 is the widest tire you can run without modifications IMHO, it's the largest tire that fits with stock equipment and without trimming. If you want to go as wide as possible with the stock wheel tubs, you can run 295's, but that requires a 1/2" spring offset and trimming back or rolling the quarter lip. Do that and a 295 is pretty much the widest tire that will fit and you have to get your backspacing just about perfect to do it if you're lowered any.
I'll get on my soapbox for a second
about what people say "fits" as far as tires go, sorry in advance. If the ride height is jacked up and/or air shocks are used, what "fits" doesn't really matter anymore. The tires can hang out past the quarters and you still won't get any rubbing, because there isn't enough suspension travel for the tires to hit the quarters. That doesn't mean the tires fit. They don't. You can't run the car at stock ride height (or lower) and have functional rear suspension and still run those tires. But they don't rub, so people will say they fit. Like these, pictures by diymirage. N50's. To be clear I'm not picking on him, this just illustrates perfectly what I'm talking about. It's his car and if he likes it that's all that matters, different strokes for different folks, his car and my car are for totally different applications and that's ok.
These tires don't rub, but they sure as heck don't fit. Maybe it's just my definition, but if a tire "fits" it actually has to fit inside the wheel well and the quarters. You could put any width tire you want on the car above, it wouldn't matter, it'll never rub. The ride height puts the quarter further above the tire than the suspension will move. But not rubbing and actually fitting are two different things. If you don't run your suspension exactly like that car, those tires will rub, because they don't fit. I don't care if that's the way you want to run your car, that's awesome, it's your car, and the 70's drag car nostalgia thing is great if that's what you want to do. But if you want those tires to actually fit you'd need a 3" spring relocation and a mini-tub.
So my point is that you have to be careful about what people say they fit on their car, because there's more than one interpretation of what fits. Sorry, rant over.
limegreen70
Pokorny Enterprise's
Yea i was just up Laurens and Saw it up there, Along with Dave Plotts Hemi car.
I would like a beefy tire and I like them Kinda tall too but it has to be tucked under the Wheel well. I cant stand a wide Tire or Wheel that sticks out 3 Inches from the car. My Friend on here has A Already shortend 8 3/4 with Yukon Axels for sale. I could get it at a Good price. It was just a Idea.
limegreen70
Pokorny Enterprise's
If a 295 is just Barley Possible, Then i am gonna have to try.An L60 14 had a section width just over 11" wide and was about 27" tall (not that short!). Basically a 275/60/14. It would have been a bit narrow for a 10" wide rim, and with "hardly any" backspacing it was probably even with or stuck out past the quarter. But that's not an issue with air shocks, since there would have been very little suspension travel and the car probably sat pretty high in the back.
You can fit a 275 on a Duster/Dart Sport/Demon without any modifications at all even on a lowered car. Springs in the stock location, no trimming on the quarter lip (unless the axle isn't centered well). Just have to get the backspacing right, and that depends on what axle you've got. SBP A body 8 3/4's are wider than BBP 7.25's and 8.25's, and of course an A-body 8 3/4 with BBP axles is wider still. A 275 is the widest tire you can run without modifications IMHO, it's the largest tire that fits with stock equipment and without trimming. If you want to go as wide as possible with the stock wheel tubs, you can run 295's, but that requires a 1/2" spring offset and trimming back or rolling the quarter lip. Do that and a 295 is pretty much the widest tire that will fit and you have to get your backspacing just about perfect to do it if you're lowered any.
I
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AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
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I dunno about Dusters cuz the last time I had one was 1978.
But I know about 68 Cudas. A 295 fits,(yes, fits), easy. With,as Blu says; a spring relocation, a lip-roll and center it up.
Now, let me tell you about 325/50-15s. Those guys just barely fit, by Blu's definition. But it also took pounding of the inner tubs in various areas and moving the axle back about 3/8".And no, I cannot fly around the turns with them in there. As the body rolls over, the inner sidewalls rub, and theres no more room on the outside and still have them "in" the tubs ,at my lowered ride height. My rear is not quite as low as Blu's; maybe a half inch higher when the 295/50-15s are on.325s are about 1.2 inches taller in diameter' 27.8 vs 26.6.
That said, in normal driving they rarely rub.And it's always on the inside, where the sheet metal is very smooth, cuz I made it so. Sidewalls make pretty good brakes though
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famous bob
mopar misfit
I`ve got 3/4' offset hangars, and stretched fenders on the front of the rear wheel opening, w/ rolled lips. found a guy wanting to sell some used 295 65 15 m-t drag radials. he`s going to mount one of them on a new 15x8 dragstar for me to see if they will fit. I did a little hammer work on the inside of the wheel well where I new it to be a problem from past experience. hope they work. wanting to decrease my "limited" hi way rpm. bad thing is, he wants $300 for the used ones, I can buy new for $412 w/ free shipping. but he might mount and balance them for free too.I dunno about Dusters cuz the last time I had one was 1978.
But I know about 68 Cudas. A 295 fits,(yes, fits), easy. With,as Blu says; a spring relocation, a lip-roll and center it up.
Now, let me tell you about 325/50-15s. Those guys just barely fit, by Blu's definition. But it also took pounding of the inner tubs in various areas and moving the axle back about 3/8".And no, I cannot fly around the turns with them in there. As the body rolls over, the inner sidewalls rub, and theres no more room on the outside and still have them "in" the tubs ,at my lowered ride height. My rear is not quite as low as Blu's; maybe a half inch higher when the 295/50-15s are on.325s are about 1.2 inches taller in diameter' 27.8 vs 26.6.
That said, in normal driving they rarely rub.And it's always on the inside, where the sheet metal is very smooth, cuz I made it so. Sidewalls make pretty good brakes though
famous bob
mopar misfit
forgot, I`ve got a new set of 275 65 15 drag radials on it now, and it looks really bad, (puny) after seeing all the 68 barracudas w/ big slicks over the yrs.
famous bob
mopar misfit
they fit, w/ a little more adjusting. sure looks better, altho I have to run a little less air pressure than I`d like w/ the 8" rims, oh well--------
roccodart440
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