I purchased a set of aluminum adapters to go from the 5x5.5 to my 80 series' 6 x 5.5" rims. The plan is to run a Pair of 255/85/16 tires I have kicking around. Becuase my trailer is a m416A1 it already has the 10" drummed 3500lb axle under it. I could have switched our just the drum to the new bolt pattern but when i measured I though it was going to put the tires too close to the body of the trailer. I'm pretty sure I miss-measured. I threw one of the 80 wheels on tonight and the tire sticks a good 5" out from the stock fender, 15" from the outside of the tire to the body. They make the Axle about 63" hub to hub. The 80 series axle is darn close to that. Traditionally one wants the trailer tires to be the same width as the tow vehicle's, correct? I don't mind doing a little tube bending and sheet metal work to make a new set of fenders.