Eibach Pro-Kit Springs lowers car 1.5 inches in front and back, I have 20 inch rims on my mustang gt with 255/35/20 tires will lowering my car force me to a smaller rim or can I keep my rims ?

 

Well, your tire diameter is more than an inch larger than the original size. So combining that with lowering might be an issue, but I can't say for sure. If you went with 255/30R20, the diameter would be much closer, at that point the tires are going to look like rubber bands on the wheels.


cheers
Ed