I am running factory 18's with the michelin pilot tires (225/45/18 and 245/45/18) now. I plan on upgrading to yokohama s-drive 225/35/20 and 245/35/20 (running stretched). Will this setup have the same overall diameter as my old setup with the OEM 18's since I am stretching the tire?

 

Your new tires will be .2 inches taller in the front and .1 inches taller in the rear compared to your current tires. So you will be a tad higher than your current setup.

 

Thanks a lot. That's not a big difference then. I guess if I wasn't stretching than it would be close to half an inch higher.

 

^For sure. When you go from 18s to 20s it usually raises the car up some.