How big of tires can I fit on my Ford Explorer?
The base model comes with 18-inch Painted Aluminum wheels, which require a wheel size of 255/65R18. In fact, this size is the case for all 18-inch wheels for the Ford Explorer. If you have a higher trim of the Explorer or opted for upgraded wheels, the tire size may change.
Does the 2018 Ford Explorer have a full size spare tire?
Tire size for all models is 255/55R-20. All Explorer models are equipped with a spare tire. If a nail or screw punctures a Selfseal tire and remains in place, the sealant surrounds the object to help seal the puncture and avoid air loss.