Wheel fitment and kit notes: this kit requires cutting your truck's subframe for proper fitment and will not fit factory 18" or 17" wheels. This kit REQUIRES at least an 18x9" wheel with a maximum of 5" to 5.50" of backspace. All 18x9" wheels should be test-fit prior to installation, due to design variations that can cause fitment issues. Stock 20" Platinum and FX4 wheels can be used with a maximum of a 295mm or 11.5" wide tire. For all other fitment questions, please contact Stage 3 directly at 1-877-578-2433.