I have A 1995 Dodge Dakota the original tire size is 2 15 75 15 the 15th I bought a set of twenties for it what size tires do you recommend to put on the twenties so that it's the same size as the 2 15 75 15 that I'm taking off So that my motor runs normal

 

You would have to have a tire only 1.3 inches thick to keep the same overall diameter. Your going to have to just deal with the speedo being slightly off or do the proper change to make it read right.