Time for some new wheels on my 1973 Plymouth Satellite. I'm thinking about getting some 18x8 for the for the front and either 18x10 or 20x10 for the back. Does anyone know the max backspacing I should be looking at? I believe the front is 3.75? I have no clue for the back. Also what are your recommendations for offsets?

I like the looks of American Racing's Torq Thrust and the Boss 338. I think these both have proper weight load.

It's only an opinion, but 18s for the front and 20s for the back won't look good. I have 17x8s on the front of my '72 RR, and 18s on the back, and even THAT is bit of a stretch, as far as looks and proportionality, on the car.

On mine, BS on the front is 4.25, but 4.00 or perhaps even 3.75 would look better. BS on the back (they're 18x9.5s, BTW) is 5.5 and fits perfect between spring and fender lip. 5.00 BS would fit also, still with plenty of clearance on the fender, but the fenders on yours, of course might have slightly different lips than the 71-72 bodies.

Also, I think the 73-74 rear end is slightly different than 71-72, but I don't remember if it's the total width or the spring perch width. I believe the tech archives has that info, though.

Thanks for the suggestions man. Yeah I think I will do the same size front and back, just different on the widths.

I guess I said it poorly. I didn't mean that different sizes wouldn't look good. In fact, I think on our cars, slightly different sizes improves the look, due to the huge size of the rear wheel wells. It's just that 18 front and 20 rear is too much. 17 front, 18 rear, or 16 front, 17 rear would be better. And different widths, front to rear is better also.

I had 245/50-15s with 15x8s at all four corners of my car for the longest time, and it just seemed that the fronts fit the wheel wells nicely, but the backs just didn't fill out the wheel wells enough.

Good luck in your quest.

Here's a pic of the rear with the 245/50-15s and AR 200S 15x8s...

I'm looking at the American Racing Torq Thrust M and it seems they only come in 17" 18" & 20" No 19's?!? I feel like 17 will be to small int the front to do a 17/18 stagger. Will a 18/20 stagger really be too much? Perhaps I will go 18's all the way around.

With an 18 in front - depending on size of tire and if the rim has a zero or negative offset - you *might* have some rubbing on the lower part of the fender behind the tire when the steering wheel is turned near to the lock.

With the 245/50-15s and 15x8s with 3.75" backspacing on my car, there was about 1/4" clearance in that situation. Of course, the 73-74 fenders are different than the 71-72s.