15 x 7s, what size would you run on a 68 four door dart ?

4mulas said
Dart seems tighter than a duster/dart sport and the best I could do with about 1/3-1/2" of clearance was a 215/65r/15 on my duster which is 26" tall. This on a 15x6" Cragar 5 spoke with about 3 3/8" backspacing and narrower than the cop wheels. To the OP, height is the main issue and you should listen to bluNblu here.

Also, to the OP, have you searched the endless threads on ‘what tire size’ can I use. All of this has been talked about at nauseum and you WILL find the answer there. In fact, just search bluNblu’s posts as he’s often one of the main contributors one these threads. The back of a dart sedan is definately tighter than of a duster/dart sport too. The planets would have to align to fit anything larger than a 27" tall by 10" wide tire on a 7" rim with perfect backspacing.

The backspacing is pretty important, with a little extra backspacing you can get taller than 26”. And it’s also a height/width thing, the wider the tires are the less height you get. So some of the drag racers run quite a bit taller than 26”, but they’re super narrow tires that sit in from the edge of the fender.

The Dart clearance changed, in ‘72 the wheel opening got longer by almost 2”, with 1” being in the front. So a ‘72 dart can actually run a taller tire than a ‘71. When I swapped over from my ‘74 Duster fenders to ‘71 Dart fenders I found the front corner clearance on my 275/35/18’s was pretty close to the same, it would be more individual car specific than model specific I think. Ride height is also a HUGE factor for clearance at the front corner.

michiganpat said
if it's out of an XJ, it's 60.5" drum to drum. Everything I've seen, YJ and TJ wrangler axles are the same width (60.5"). I have an XJ one in my garage I was going to put in my duster, but it does limit tire size unless you go high offset wheels, so I'm looking at picking up a ranger 8.8, which is 58.5" wide.

Ok, so that’s great information. The 68-70 B-body rear I run is 60.125”. And when I had cop wheels (15x7” with a 4.25” backspace) I was totally maxed out to the quarter with a 225/60/15. So if the XJ is wider, even that little bit would mean a 225 would be out.