Diamond T 10 Lug Dually Wheel Adapters, Ford (1973-97) F-350 Dually (front & rear)
Are Wheel Spacers Actually Safe? | ARKON OFF-ROAD
Amazon.com: 1999-2010 Silverado Sierra 3500 HD Customer 8 To 10 Lug Adapters Steel Wheel Spacers 8x6.5" To 10x285.75 MM 10x285 MM Semi Wheels 220.1mm Hub Centric Bore USA MADE : Automotive