I often pull up to 22K lbs behind my 04 dually with 185K..... been across the scales at 15,500 KG in Canada, thats 34,100..... and often have close to 5,500 on the front axle, and close to 8,,000 on the rear axle with 20,000 on the trailer axles...
This truck has never seen a full tank of fuel through the truck empty.....
The trailer has hyd, disc brakes... . and works very well... ... .