Hy JRMunn, the wheels you have are six bolt Budd wheels, these are stud piloted wheels not hub piloted wheels. There are two different wheels listed for 9.00"X20" tires, a 6.5" and a 7.0" wide wheel, both these wheels have a 6.0" offset. The wheels should be able to accommodate tube type radial tires. the original p/ns for the wheels are: 6.50" wide wheel 5769149, and for the 7.0" wide wheel 2352185, hope that helps.
