Search first then ask , u will get allot more info that way, the basic questions will be answered ,... BUT... No matter what anyone says, there is a basic rule tried and true here, first duels are more stable with a load so better if U are going to fill her up, and singles are better for traction, simply because the back tires can drive right thru the path the front tires made, this is the basics,'... And as for tire wear duels last longer, the bigger tires do wear faster, they are more aggressive and are really more off road than on, but it is up to U it is your truck, and experience from the troops here is ..., i will let u know that under a load the big single radials are known for when running low pressure they tend to experience catastrophic side wall failure when fully loaded, and duels have a better ability to not do this, .... these are more than opinions, i like to mention when its an opinion or facts. these are facts. Your question on how do they drive different, WELL... these are tactical trucks, not over the road trucks, u need to understand that first, speeding is not what these trucks were made for, they handle just fine with any of these tires, BUT again, the bigger radials will be much more dangerous on wet and even regular roads, case in point the M 939 series trucks that went to 1400s had a roll over problem , that was later recognized as driver error, but the trucks speed was lowered by order to slow down the drivers, and an ABS brake system was installed to better handle the bigger more bouncy tires, that also like said above are severe off road tires and when driven on roads are well need to be driven with care. these are also facts... fyi, good luck .....