Please read below about all your options
Ford F53 Motorhome Chassis normally come stock with a 19.5” x 6.75” Steel wheels and 245/70R19.5 tires. In the event you want to switch to an Aluminum wheel set up you will find that Alcoa nor Accuride makes a 19.5” x 6.75” with the correct 225mm bolt pattern. Both manufacturers do however make a 19.5” x 6.00” for the F550 Chassis that has the same 225mm bolt pattern. The 245/70R19.5 tire will fit on the 6.00” wide wheel just fine and the wheels will have the same 4,000 lb load capacity as the 6.75” stock steel wheels.
The only difference between the kit for the F550 Chassis is you will also need to replace the inner steel wheel with matching 6.00” wheels to ensure proper tire wear on the dual wheels. You will not want to have to dual wheel each mounted on different width wheels. To help offset this additional cost please inquire about trading in your existing steel wheels for up to $450 depending on the condition and age. Ford F53 Chassis were 8 on 225mm lug pattern from 1998 thru 2004 and have switched to a 10 on 225mm lug pattern from 2005 until now. 1997 and older Ford Super Duty Chassis with stock 16” 10 lug wheels are no longer available but we can have 16” or 19.5” custom made in Aluminum but normally take approximately 2 weeks for delivery. Some newer F53 Chassis may come with 22.5 8 or 10 lug wheels in which case please call us at 800-830-4547 so we can better determine what you will require.