Airbagit 4" Lifted Spindle Ford Ranger (Not Edge) 2001-2010. The factory spindle has a small shaft and can easily break when using wider wheels and Off Road. We are the only Manufacturer that replace the spindle shaft with a larger F150 Shaft that WILL NOT BREAK! You will need to change your outer bearing to F150. If you have questions or need help, call our Tech Line at 800-682-8789