Wheel and Tire Fitment: this kit requires wheels with a maximum of 5.50" of backspace in order to clear 12.50" wide tires. Factory 18" and 20" wheels can be used with this lift kit, however, you'll be limited to a maximum of an 11.50" wide tire or close metric equivalent. This kit will not fit with factory 17" wheels. Please call us directly at 623-434-5277 for questions on wheel and tire fitments.