Hey all, so I did a little searching and before I made a purchase I want to be certain. I have 18x9 rims with 245 40 18 wheels right now. I want to put on street radials and would like to know what range of tire I can go with that will fit and won't throw off the speedo. Thanks so much all.

 

Wheel size calculator:
http://www.wheel-size.com/tire_calcu...-50-17X7.5ET40

Tire Rack:
Their tool will return wheel widths you don't want, so it'll be a lot to wade through, but still useful
http://www.tirerack.com/