These adaptors are designed so that when installing factory F-350 wheels, you will have the factory stance/width.
• 8x6.5 inch option is for 1998 and Older trucks. It will maintain the 8x6.5" (8x165.1mm) pattern for the wheels from that same year range. These adapters are approximately 3" thick.
• 8x170mm option is for 1999 and later trucks that plan to run dually wheels with the 8x170mm pattern that came on the 1999-2004 F-350 Dually Trucks. These adapters are approximately 3.5" thick.
• 8x170mm to 8x200mm option is for 1999 and later trucks that plan to run dually wheels with the 8x200mm pattern that came on the 2005 and later F-350 Dually Trucks. These adapters are approximately 2.25" thick.
