Ford has changed the bolt pattern from 4-108 to 5-108, so our wheel suppliers have placed more emphasis on 5-108. Original Equipment wheel sizes range from 15" to 18' depending on trim level.
Overall clearance is good, so you can run 19" wheels on 235/35-19 or 245/35-19 tires. 20" wheels will work as well with 235/30-20 or 245/30-20 tires.
How big should you go? It depends on how you would like to balance ride comfort versus looks. The quality of your local roads is a factor as well. Generally, drivers in the west, southwest and south have better roads, allowing for larger wheels without excessively compromising ride and durability.
Some Jaguars, the Land Rover LR2, Lincoln LS and some Volvos also use 5-108, so selection should improve for these vehicles as well.
Visit the Upgrade Garage to find the ideal wheel for your vehicle.