I doubt you'll find any tire that will work. The wheel has nowhere near enough back spacing.
I doubt you'll find any tire that will work. The wheel has nowhere near enough back spacing.
Needs to be 4 1/2" backspace to fit 245/50/15 or 225/50/15 tires. And I don't think anyone makes a 245/50/15 anymore.
Other than that you'd have to try a 60 series tire that would be too narrow for 8" wide rim. Like maybe a 205.
......
Barracuda's have wider fenders up front than Dart's do. You'd never clear 245's on 15" rims on a Dart without serious body modification. 245/50/15's on a 15x8" rim with 4.5" of backspace would stick out a full 1/2" further than the 275/35/18's on my Duster (with a demon front end). I don't have an extra 1/8", let alone an extra 1/2".
Plus, your fenders have been modified right? Rolled and pushed out?
I have a 68 Dart GT conv also. I just don't talk about it much. I've run 225/60/15 on cop rims.
I did run 245/50/15 on 15x8 4.5" backspace rally's briefly. The 245's were really too close. Yes they would rub a little on the top fender brace bolt. But like I said, the thick poly bushing and positive caster helped with front tire clearance. Those are still very short tires. The short tire allowed me to flirt with disaster.
I now have 245/60/15 with 15x 6.5" rally's. BUT I had to push out the front corner of the wheel lips by repositioning the lower fender brace forward of the factory hole on the bottom of the fender. Pushed it out and 1-2".
Here's a picture of the front 15x8 4.5" backspace rims with 245/60/15 tires that were really too close.
View attachment 1715056174
Well that sounds pretty conclusive. I originally wanted a 15x7, but the wheels I chose(Cragar 69 delux) are discontinued, and limited to whatever is left in stock. The 7's weren't available.
How about tire size for a 15x6 with 3-1/2" bs? That's the next best option I believe.
I found the 15x7 with a 4-1/2 b.s. Any thoughts if that will fit? It should, correct?
Also, what tire size would be applicable?
I found the 15x7 with a 4-1/2 b.s. Any thoughts if that will fit? It should, correct?
Also, what tire size would be applicable?
225/60/15. But watch the front bottom of the fender lip to tire when turning. Have someone turn the wheel and watch until it's at its closest.
Take the bottom front fender support and adjust it outward as possible. If more room is needed add a hole on the bottom fender flange forward of the original hole.
How about tire size for a 15x6 with 3-1/2" bs? That's the next best option I believe.
I have these on my fronts, and although they are too wide for my wheels they'd be perfect for a 6" wide wheel, while keeping the front end down swith a sorta raked look if that's what you're after.View attachment 1715056493
holy crap that's a bitty little tire! 22.76" tall? That's way shorter than the factory ever ran on these cars. Heck those tires have a shorter sidewall than most of the guys with 17" rims. I have more sidewall on the rear tires of my Duster and I have 18" rims.
Like this... these are 225 60 15s on 15 x 7 with 4.25 backspace. I would say you are better off with 4.5 backspace... and you will likely still have to tweak things to keep them from rubbing. This car has 1.14 torsion bars and shocks with a good bit of compression dampening and I can still get some rubbing at times.
View attachment 1715057560
I got 1.09 bars
But seems to me yours is pretty close to the fender and 8" rims would move it out 3/4 of an inch further that way since its only got a 1/4 inch more back space.
Exactly.
15x7's with a 4.25" backspace will be a better fit. The 15x8's with 4.5" of backspace will be closer to the fenders, just like your math suggests. The 8" rim is an inch wider, but only has an extra 1/4" of backspace. So you lose a 3/4" of fender clearance. And you can only run 225's anyway, so you don't need the 8" wide rim.
I might add you don't need drop spindles with 1.09" torsion bars either. You can lower that car as much as is practical with just those bars and a smaller lower bump stop, and you'll have better suspension geometry than with drop spindles.