[truckdog62563]

Probably the simplest means of increasing road speed is the use of the 8.25-20” tires. BUT, be alert to whether they can be safely mounted on your stock wheels. If you now have 6.50-20” tires it is likely that you now have the 3.75” rims (5” by old standard), or 4.33” (6” by old standard). The 8.25-20” was listed in the Green Bible as usable on the 5” (7” old system) or 6” (8” old system). The 5 lug x 8” bolt pattern was used into the 1970s, so yards still have inventory of these newer trucks. The other option would be to find the newer tubeless 22.5” wheels that could be fitted with 9R22.5” tires that are the size equal of the 8.25-20” tube type. Stu