2024 Peterbilt 579 Ultraloft Specs. The truck tractor has a gross combination weight of 36 tons. 579 tractor with 80 double bunk ultraloft sleeper with epiq aero package.

Of storage and the largest mattresses in the industry; Specs include 18 air slide fifth wheel, 13k front axle, 38k rear axle with 2.79 ratio, peterbilt flex air suspension, air disc brakes all.