This rig is a 2017 Ram Mega 3500 dually short box with a Cummins and ASIN tranny. This truck has the air ride deal on the rear axle - it'll make a believer out of you as far as ride goes - and it's a lot easier on the trailer as far as jarring goes. The trailer is a 30' aluminum trailer that all loaded up with my heaviest car weighs in at almost 12,000 pounds - but not quite. I'm in the 10% deal with my tongue weight, and at 85 miles an hour this thing is rock solid, even in a slight wind - no sway bars or anything but a tow behind hitch with a 2 5/16" ball. If it's windy I wouldn't go that fast either though.