Most folks can run 245 or 255 60's on rear, 225 or 235 on front. If you want equal size around a good size is 235's all the way around for a meaty look. Do a search on the site..the size question has been beat back and forth for years now. Jee Kz, just beat me to it
IF YA GOT THE FACTORY STOCK SUSPENSION I RECOMMEND YOU PUT A PAIR OF 235/60 ON THE FRONT WHEELS , THEN CHECK ALL CLEARANCES & IF OK LEAVE AS IS & INTALL 245 ON OTHER PAIR!! IF RUBBING OCCURS THEN PUT THAT PAIR OF 235 /60 ON THE REAR OF CAR OF WHEELS & THEN INSTALL 225/60 ON THE OTHER PAIR & INSTALL THEM ON FRONT.