Another (will this fit?) Wheel and Tire ?

-
wes beem

wes beem

Well-Known Member
Joined
Apr 16, 2017
Messages
1,014
Reaction score
620
Location
ohio
Wanting to run the wheels linked below, and i want the widest possible tire i can fit in the back on my 71 Duster with disc brakes up front, drums in back. Up front I don't care how narrow i have to go....I keep seeing people say you need 4.5" of backspacing for mopar a bodies but every single wheel i like is 3.75" or less. Will these work, and if so what size tires can i run?

American Racing 235865B: AR23B Series Wheel Size: 15" x 8" - JEGS High Performance


American Racing 235765B: AR23B Series Wheel Size: 15" x 7" - JEGS High Performance
 
I would like to recommend you purchase a wheel simulator and measure for wheels and tires that way you don't have to rely on somebody else experience or lack there of, the one I bought was around 100 bucks but that's a small price to pay for exact measurements on wheels and tires you know will fit. good luck
 
what bolt pattern? on a duster with small bolt pattern you can run a 275 60 15 by 8 with 4.25 BS
(with some decent shocks) or 255 60 15 x7 also 4.25 BS small Bolt pattern

With 3.75 Back Space i dunno the bigger tire would stick out not a good idea
 
Slantsix64 said:
what bolt pattern? on a duster with small bolt pattern you can run a 275 60 15 by 8 with 4.25 BS
(with some decent shocks) or 255 60 15 x7 also 4.25 BS small Bolt pattern

With 3.75 Back Space i dunno the bigger tire would stick out not a good idea
Click to expand...
5 X 4 1/2
 
Last edited:
devilchicken said:
I would like to recommend you purchase a wheel simulator and measure for wheels and tires that way you don't have to rely on somebody else experience or lack there of, the one I bought was around 100 bucks but that's a small price to pay for exact measurements on wheels and tires you know will fit. good luck
Click to expand...

didnt even know that existed, Thanks!!
 
33IMP said:
If you truly have a Chevy pattern on your Duster, we have no idea what you have done to it, and couldn't possibly tell you what would fit.
Click to expand...

im a dumbass. That's what was on the Impala I just sold LOL. Its the mopar big bolt pattern.
 
Okay, then apparently you have some sort of disc conversion with bbp on the front, which might have moved the wheel mount face outward. So, we couldn't tell you what would fit.
On the back, we don't know if it's a 7 1/4 (highly unlikely with a bbp) or an 8 1/4 swap, or a a-body 8 3/4 with a pattern change on stock drums and axles, or an a- body with b-body brakes and axles, or a b-body axle swap, or which b-body swap.
Long way of saying, your gonna have to do your own actual measurements
For what it's worth, if the wheels you want are one piece and don't offer different b.s. , I would go smaller by an inch on both ends, 15x6 and 15x7.
First thing I would do is measure the actual drum to drum width of your rear (the cars, not yours), and go from there.
 
Craig Burriss said:
Anything will fit if you want it to enough
Click to expand...

th?id=OIP.jpg
:lol::lol:
 
Craig Burriss said:
I prefer saws alls and hammers, but to each their own. Lol
Click to expand...

Funny story. Back around 1979 or 1980, I went with my buddy to the wheel/tire store. He had a chebby van he was giving the 4x4 look. He bought the same size all-terrain T/A's. He had lifted it and it looked great with the new shoes, but the front hit the fender pretty good. He asked the shop for a Sawsall and went at it. It was a fairly new van too. They thought he was crazy!
 
Last edited:
I left myself open for this. LOL.


WITHOUT changing anything except how high the *** of the car sits (its getting air shocks and pumped up) ....What will fit :)
 
Again, you'll have to measure the rear-end in your car, to know what backspace you will need. We can't do that, or even begin to answer your question without more info.
 
Or you can do what I did;
buy whatever you want up to ~295s, get the tires mounted on whatever appropriate wheels you like, up to 10", remove the rear end out from the car, slide the new shoes in and measure the flange to flange distance, then get your rear end narrowed to fit. You will need no less than 3/8" from the sidewall to the inner tubs. You will have to move the springs over a bit.
Yes 295s will fit inside the tubs with no rubbing, even lowered.
Yes you can install 295s on 10s, but for long tread-life, you will have to reduce your tire pressures to about 24psi or less. Honestly, if I had it to over, I would mount them on 12s so I could run a tad more pressure. Or
I would just run 275/60s on the 10s
 
AJ/FormS said:
Or you can do what I did;
buy whatever you want up to ~295s, get the tires mounted on whatever appropriate wheels you like, up to 10", remove the rear end out from the car, slide the new shoes in and measure the flange to flange distance, then get your rear end narrowed to fit. You will need no less than 3/8" from the sidewall to the inner tubs. You will have to move the springs over a bit.
Yes 295s will fit inside the tubs with no rubbing, even lowered.
Yes you can install 295s on 10s, but for long tread-life, you will have to reduce your tire pressures to about 24psi or less. Honestly, if I had it to over, I would mount them on 12s so I could run a tad more pressure. Or
I would just run 275/60s on the 10s
Click to expand...


i never even thought of that, Thanks!!!
 
Ok, so Google (YouTube) how to measure wheel backspace. It's really easy, and then you will know. Yes for me 4.25 is good on a 8 inch wheel. On my 74 Duster 3.75 won't work without Modification. I like a 245 or maybe even a 255. 275 too big in my opinion. Many will tell you 275, but that won't work on my Duster without Mods. get your measurements and you will know for sure.
 
wes beem said:
Wanting to run the wheels linked below, and i want the widest possible tire i can fit in the back on my 71 Duster with disc brakes up front, drums in back. Up front I don't care how narrow i have to go....I keep seeing people say you need 4.5" of backspacing for mopar a bodies but every single wheel i like is 3.75" or less. Will these work, and if so what size tires can i run?

American Racing 235865B: AR23B Series Wheel Size: 15" x 8" - JEGS High Performance


American Racing 235765B: AR23B Series Wheel Size: 15" x 7" - JEGS High Performance
Click to expand...

In the front, with BBP brakes and assuming you probably have a 73+ disk set up your 15x7's with a 3 3/4" backspace will put the outer lip of the rim a 1/2" further out to the fender than the 18x9's I run on the front of my car. Even with a 205 wide tire they'd stick out further than the 275/35/18's I run. So, those 15x7's are a bad choice. Most of the BBP disk conversions widen the track width at least as much as the stock 73+ BBP disks, so, I'm pretty confident in that recommendation. With a 7" wide rim up front with BBP disks you really want 4.25" of backspace. 4" can be done if you stick to 205's, but less than that is just gonna put the wheel too far out unless your ride height is going to be super high.

In the back it will depend entirely on what axle you have and how wide it is.

33IMP said:
On the back, we don't know if it's a 7 1/4 (highly unlikely with a bbp) or an 8 1/4 swap, or a a-body 8 3/4 with a pattern change on stock drums and axles, or an a- body with b-body brakes and axles, or a b-body axle swap, or which b-body swap.
Long way of saying, your gonna have to do your own actual measurements
For what it's worth, if the wheels you want are one piece and don't offer different b.s. , I would go smaller by an inch on both ends, 15x6 and 15x7.
First thing I would do is measure the actual drum to drum width of your rear (the cars, not yours), and go from there.
Click to expand...

Actually a ton of A-body 7-1/4's came with the BBP. Any 73+ A-body with front disks and something other than a 340/360 could have gotten them, not all the 318 cars got 8 1/4's. My '74 Duster came with a /6, BBP disks and a BBP 7 1/4 rear. And since '74 was the highest production year for Dusters, well, there are a lot of BBP 7 1/4's out there.

Going smaller in the back on a Duster is kinda silly because of how much tire you can get back there. 275's fit most cars just fine without any modifications, there are literally DOZENS of Dusters/Demons/Dart Sports on this board with 275's in the back and no mods. If you don't believe me, well, here's a few threads showing well over a dozen Dusters doing exactly that...
Demon Rear Wheels
275/60/15 tires on stock Duster

Now if you don't want to run 275's in the back that's fine, you do need to get the backspace right in order to do that. And of course to get the backspace right you'll need to know which rear axle you have, because the BBP 7 1/4's and 8 1/4's are a completely different width than an A-body 8 3/4 with BBP axles. And even that assumes you don't have a B-body 8 3/4, which is not an uncommon swap on a Duster.
 
the rearend is an 8 1/4 from a 73 V8 Duster. I know because i called the junkyard today and ill be picking it up monday. If it doesnt have disc brakes and BBP it will when it goes under the car.

Now my main concern is how WIDE i can go in the back, I dont care if i have to go with a skinny pizza cutter up front because thats totally my diggs visually, Im mostly concerned with getting the absolute fattest tire i can fit out back with these style wheels and if it sticks out past the fender well thats fine as long as it doesnt rub.
 
wes beem said:
the rearend is an 8 1/4 from a 73 V8 Duster. I know because i called the junkyard today and ill be picking it up monday. If it doesnt have disc brakes and BBP it will when it goes under the car.

Now my main concern is how WIDE i can go in the back, I dont care if i have to go with a skinny pizza cutter up front because thats totally my diggs visually, Im mostly concerned with getting the absolute fattest tire i can fit out back with these style wheels and if it sticks out past the fender well thats fine as long as it doesnt rub.
Click to expand...

I think you're missing the point. It doesn't matter how narrow the tires are, the rim itself is going to stick out really far in the front. And then there's the rear tires- there's only a couple of tires that come in a 15" rim that are available in a 255 or 275. If you match that up with the front tire, the only thing you can run is a BFG T/A and the only size that will even come close to working in the front is a 195/60/15. Which is only 24.2" tall. The tires would be in about the same spot as the outsides of my 275/35/18's, and the rims would stick out a 1/2" further. And you'd have bitty little 24" tall front tires.

In the back, an 8 1/4" rear is about 1" narrower than an A-body 8 3/4 with BBP axles. So that means knocking a 1/2" off of the backspace you'd typically run with a BBP 8 3/4, which would mean you'd be looking for a 15x8 with about 4" to 4.25" of backspace. If you add disks to the rear it will widen the track by another 5/16" or so per side. So, that would mean a 15x8 with a 4-5/16" to 4-9/16" backspace to center up a 275/60/15. If you run a 15x8 3.75" that tire is going to be sticking out a good 1/2" from where it needs to be, which means it will be into the quarters because there's no extra space with a 275. Only way around that is to raise the rear end, which means modifications. Running SS springs, or air shocks (stupid), or cutting back the quarter lip. Otherwise it will rub, because it will not fit inside the quarter.

You'd be way better off picking a different wheel that you can get in a better backspace for both the front and the rear.
 
Last edited:
wes beem said:
i found this wheel, its offered in a 4.25" backspacing, any reason this wouldnt fit up front? Boy i never thought it would be so damn hard to find a decent wheel to fit a duster that isnt a cragar ss or a torque thrust II.

Legendary Wheels Magnum 500 Wheel Series N/A | LW50-50754E


American Racing Vintage VN501 500 MONO CAST 15X7 0 5X114.3/5X4.5 Satin Black


(1) American Racing VN501 Satin Black - 15x7 | 0 ET | 5x4.5 Wheel Rim | eBay
Click to expand...

All of those should work. The first one is advertised as a 15x7 with a 4.25” backspace, which would be the best fit.

The next two links list the specs at 15x7 with a 0 offset or 4” backspace. That’s workable, you probably won’t get a 225/60/15 to clear with those like you could with a 4.25” backspace, but you’d still have options in 215 or 205 that would be fine.
 
72bluNblu said:
All of those should work. The first one is advertised as a 15x7 with a 4.25” backspace, which would be the best fit.

The next two links list the specs at 15x7 with a 0 offset or 4” backspace. That’s workable, you probably won’t get a 225/60/15 to clear with those like you could with a 4.25” backspace, but you’d still have options in 215 or 205 that would be fine.
Click to expand...

Sweet!!!
 
You must log in or register to reply here.
-

Back
Top