Okay, the baseball bat trick works, but you have to be VERY careful and you need 2 people. It’s safer….and can be done by yourself using a socket wrench and a set of deep sockets.
This is assuming you already have the bigger tires on the car. Tape the fender lip with masking tape to protect the paint. Laying on the ground looking up at the clearance between the tire and wheel well you will see that the lip is closest to the tire in the center. Find the deep socket that just squeezes in between the tire and the wheel well lip about 3 inches from the tightest point. Use the wrench to ratchet the socket across the top of the tire….believe me the socket will grip the tire and roll while sliding along the tape. Reverse the ratchet and roll the socket back to the front. Select the next socket size up and repeat until you get a smooth “roll” of the lip with the clearance you want.
