There were some Pro Comp lifts made for the 09+ F150 that allow someone to put 18" wheels however the majority of the kits made require 20". You should call 4wheelparts and ask them. Have your kits serial number available and they should be able to tell you. This is what I did. Good luck.
OIF and OEF Veteran
: Truxport Tonneau, Line-X, Gotts, EZ-Down, Pro Comp Stage II 6 inch lift, 20x9 XD Hoss Wheels, Pro Comp Xtreme A/T Tires