got a few ?s for tire gurus

[scikotictc232]

Hey there I have a 1970 duster that I am currently building , I am to the point were I need a wheel and tire set for the rear to start building my wheel tubs, the car has had custom frame rails installed four inches towards the middle on both sides and was built to clear 345/ 30~ 18s, my question is I wanna run a set of 15 mopar rallys also that have been widened, question one is I found some were that a 345/30 -18 is roughly 26 inches tall, 13.8 inches bulge to bulge is this correct ? So what would be an identical tire to run as far as slick or street tire for an 15 inch wheel ? Second question is a 345 width tire or similar pushing the limits of a 12 wide wheel instead of running a 14 inch wide wheel? Third question would be what would be a similar size to a 345 tire for a 14 inch wide ralley wheel ? Thanks for your time

[JayR]

Your only options I know of that wide in 15" will be drag tires and will be measured in inches instead of mm as in 26x13 or the like so look to racing brands like Mickey Thompson, McCreary, M&H, etc.

Your specs are right there for actual size but since the only 345/30/18 out there is a BF/Goodrich Drag Radial, you should consider that your all purpose tire instead of swapping or look to a 335/30/18 for a lot more options.

12-13" is the perfect wheel size for a 345.