My new wheels won’t fit

My 2 cents...

1. take your old tire and wheel and mount it on the car.
2. have the tire support the weight of the car with the car on the ground(ie all 4 tires on the ground)
3. measure the back side of the tire to the spring
4. measure the front of the tire to the edge of the fender lip
5. measure the outside of the tire to the fender lip
6. measure the old tire and wheel back spacing
7. measure the tire cross section width
8. measure the olde tire diameter.
9. use the new tire and wheel to get the same measurements as in #6 thru #8
10. now do some math! (the hard part!)

with this info you will know how wide, tall a tire can be and what backspacing you will need to make it all fit.

Keep one thing in mind. the rear end moves around under normal driving, it will move side to side when cornering, forward and backward when moving up and down, and it will rotate as the body leans to one side or the other, and will move up and down from weight and bumps. all these things need to be taken into account or you will have tire rubbing somewhere.

Also some tire shops have a tool that mounts to the car inplace of a tire wheel combo that can be adjusted and it will get the max sizes for you.