I have a 1994 Dakota with the standard, plane jane 15" 6 lug pattern rims. (215/75/15)

I also have a 1999 Dakota with the larger, 15" 6 lug pattern rims. (235/75/15)

Will these rims interchange?

I really would like to go with a smaller tire, spending less, as the 99 is a winter beater...

 

The 94 should fit fine on the 99; the 99 may rub on the upper spindle / control arm on the 94.

RwP

 

4wd to 4wd : yes
2wd to 4wd : yes
4wd to 2wd : no

Tried to put 235s on my 91 from 215s and they were too big cuz it sits a bit lower

 

I've got 235s on my 1988 2WD and they fit fine.

Depends somewhat on the shape of the springs and the wheels.

I WILL say I've got Jeep wheels on my 1988 also ...

RwP

 

I have 2 left over mag wheels with 225/70/15 on them left over fron my 92 that I use as spares on my 99 both 2wd. Over the years I have seen many 96- older 2wd with 235s on them.

 

Just my opinion, but I would check inside the door and see what size was the factory tire. After that, I would only use that size or larger. I would never go smaller then what the truck was designed to use.
IMO this falls into the same area as tow capacities, and weight limits. Try not to go out of bounds on any of these issues. YMMV

 

Many times what the door tag says isn't what the truck came with. I've had several where the truck has come from the factory with larger than what the door tag says

 

Yes; the door tag on most of our trucks will list the standard tire which may or may not be the factory equipped tire, and most likely will not be the size the truck has now.

Also, some perusal of the weight capacities of tires is worth doing.

For instance, my truck requires a 107+ to properly support the load capacity. Factory would have been a LT215/75R15D (Light Truck load range D - or eight ply rating) with 60PSI (!!!) in the back.

I can run P235/75R15XL (P series, XL rating, to 50PSI) at 48PSI to support the same weight. That's a 109 weight rating tire. (That 109T / 104S etc? The numbers are the weight rating, the letter is the speed rating.)

As long as you keep the same or greater weight rating, and the same or greater speed rating, you should be OK. There are other considerations (speedometer/odometer may be off if the outside diameter changes, some driving wants a longer tie patch which a skinnier tire will have, others want a wider patch which a wider tire will have, best compromise is if you can go square, etc.)

RwP

 

I agree you can generally increase tire size, but again, I would not go smaller then what is listed on the door. Example, if the 99 says 235/75/15 I would not run a 215/75/15 off of the 94 truck.

 

Right now just a winter beater, around town, no hauling, towing etc. Still searching the area for a matching set.