74 Duster wheel and rim sizes.
Nope. Not at all.
I ran 225/60/15's on my Duster on 15x7's with 4.25" backspace, no problems at all. I had to max out the lower fender to bumper braces, but that was it. Tires were as close to the fenders as they could be, but nothing rubbed and the car sat fairly low at the time.
275/60/15's will fit just fine in the back too with the right backspace, even on a lowered car (although a rear sway bar would help to keep body roll down). 15x8's would be fine, so would 15x7's. Backspace will depend on what rear axle you run and whether the axles are BBP or SBP, the 8 3/4's are wider than the 7 1/4's even with BBP axles. On an A-body 8 3/4 with BBP axles and stock spring locations you usually want 4.75" to 5" of backspace on a 15x8 for 275's on a Duster.
You can fit a great deal more tire than that on a Duster too, but not with 15" rims because of the backspace/clearance limitations. I have 18x9's with 275/35/18's up front and 295/35/18's out back on 18x10" rims on my Duster/Demon tribute, but I have a 1/2" spring offset out back and I trimmed the quarter lip back a little. But my car sits pretty low now.
With 225/60/15's on 15x7's with 4.25" backspace all the way around...
Now with the 275/35/18's and 295/35/18's...
Nope. Not at all.
I ran 225/60/15's on my Duster on 15x7's with 4.25" backspace, no problems at all. I had to max out the lower fender to bumper braces, but that was it. Tires were as close to the fenders as they could be, but nothing rubbed and the car sat fairly low at the time.
275/60/15's will fit just fine in the back too with the right backspace, even on a lowered car (although a rear sway bar would help to keep body roll down). 15x8's would be fine, so would 15x7's. Backspace will depend on what rear axle you run and whether the axles are BBP or SBP, the 8 3/4's are wider than the 7 1/4's even with BBP axles. On an A-body 8 3/4 with BBP axles and stock spring locations you usually want 4.75" to 5" of backspace on a 15x8 for 275's on a Duster.
You can fit a great deal more tire than that on a Duster too, but not with 15" rims because of the backspace/clearance limitations. I have 18x9's with 275/35/18's up front and 295/35/18's out back on 18x10" rims on my Duster/Demon tribute, but I have a 1/2" spring offset out back and I trimmed the quarter lip back a little. But my car sits pretty low now.
With 225/60/15's on 15x7's with 4.25" backspace all the way around...
Now with the 275/35/18's and 295/35/18's...