I searched the site and did a Goooogle search. This is about all I got (from the Uniroyal site) "If you must use radial tires with bias-ply tires on the same vehicle (not recommended), the radial tires must always be placed on the rear axle. Never mix radial and bias-ply tires on the same axle." I want to run radials on the front of my Dually and 4 bias plys in the rear. Why is this not a good idea? Any hard facts? Thanks, Eric M.