2025 Peterbilt 579 Ultraloft Towing Capacity. See peterbilt truck tractor for sale ironplanet.com. 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.

579 tractor with 80 double bunk ultraloft sleeper with epiq aero package. New 2025 peterbilt 579 80 double bunk ultraloft in eau claire wi, peterbilt continued to improve the model 579 with the addition of the ultraloft sleeper cab and the epiq aerodynamic package,.