Not sure what rimDiameter size options are for your 2018 Lexus IS300 Rear-wheel drive?
Choose from the options below.
Version/Option
Tire Size
225/45R17
225/40R18
Front: 225/40R18, Rear: 255/35R18
255/35R18
225/45R17
Version/Option
Tire Size
Version/Option
Tire Size
255/35R18
225/45R17
Version/Option
Tire Size
225/45R17
225/40R18
Version/Option
Tire Size
Front: 225/40R18, Rear: 255/35R18
255/35R18
Version/Option
Tire Size
225/45R17
Find your version / option
There are two places to find your tire size. Look directly on your tire sidewall or inside your driver’s side door jamb for your vehicle’s tire size.
Passenger Tire Sidewall
High Flotation Tire Sidewall
Inside Your Door Jamb