Pros and cons for spread axle vs tandem on end dump

me and a buddy was having a discussion what’s the pros and cons for spread axles on a 40 ft end dump vs tandem ?? If you can only haul 80k why is a spread axle needed ? Please elaborate thanks !!

 

part of him likes buying tires

 

So what do you prefer ?

 

Well, the spread gives you 40,000 lbs on the rear of the trailer. Depending on the product, you have more flexibility to pile it up back there I guess. Also, the front axle will pull some weight off the drives, so if it's a heavy tractor, that would be a small plus.

 

What Zeviander said, also if you put an air lift on each axle,you can save wear on tires by running on a single axle when empty and shortening your turning radius(just watch the swing), it also gives you more stability when dumping(unless it's a frameless).