With 18x8 rims you stand a good chance of rubbing on the front fender wells. 17x7 is the max you should go in the front without modifications like fender flares.
tirerack.com has a vehicle specific conversion table for rim sizes I would look there.
The proper tire size for a 1990 dodge dynasty are P195/75R14. These tires are a 14 inch size tire.
Yes you can put 185/60-14 size tires which will have the overall same diameter as your stock tires. Obviously you will need to get new wheels/rims to accommodate those tires.
The original tire size for a 1990 Jeep Cherokee Laredo is P195/75R15. The tires are for 15 inch wheels for the vehicle.
New tires with the size 15 inch will fit 15 inch rims perfectly.
Anything from a 245 to a 265 will fit with 15 inch rims if you have 16 inch rim go with a 255 of 31" tires
15 inch tires the exact size was 215/75R15
I have a 2002 Nissan altima with tires 205/65R16 can I replace them with 215/65R15, the tires came on 5 bolt rims and will fit on the altima. If the tires are on 15 inch rims, you are ok. You can not put 15 inch tires on 16 inch rims, or 16 inch tires on 15 inch rims.
No!It is very dangerous to try to mount the wrong size tires on a rim.
15 inch tires from 185 to 225 width.
Putting a lift in a 2013 Jeep Wrangler and using 33 inch tires depends on what size tires you are using now. You can get 33 inch tires to fit any size rim. If the Jeep is already lifted you may not need anything else but tires. A 2003 Jeep Wrangler, Rubicon Edition, has a 2 inch suspension and uses 33 inch tires.
16 inch
It depends on the size of the tires--you'll get fewer 22.5-inch tires in a trailer than you will 13-inch ones--but I've hauled 800 tires in one load.