BAM! http://www.1010tires.com/Tools/Tire-Size-Calculator/215-45R18/245-45R18
Type: Posts; User: tanspeed3
BAM! http://www.1010tires.com/Tools/Tire-Size-Calculator/215-45R18/245-45R18
guys have ran 255/40/18 on a stock pu wheel (7.5") and have been fine. it would be similar in size to the 245/45