I agree that U-Haul uses bias ply on their trailers, and would like to add my opinion as to the reasons. I would bet the vast majority of people renting U-Haul trailers are not experienced trailer towing folks like us. Probably way more instances of curb hitting per 100 road miles travelled. They are probably more durable in that situation. Also, The u-Haul people are not at all concerned about their customers fuel economy, Just the companies own costs, and I would bet they get their bias ply tires quite cheap by the container load. And just think, every time someone blows one out, they get to charge the customer for a full replacement at retail price. They probably rarely replace them due to tread worn out. Now add in the fact That the bias ply tire is less likely to tear the fender off the U-Haul trailer, And we have a winner.
