2025 WESTERN STAR 57X, Heavy Duty Trucks - Day Cab Trucks, Axle Configuration: 6x4Tire Size - Rear: 11R22.5Tire Size - Front: 11R22.5AuxiliaryPowerUnit: NoBrakeType: AIREngineMake: DetroitEngineModel: DD13SleeperSize: NONWheels: AA