2026 WESTERN STAR 49X

49X — WESTERN STAR X-SERIES VOCATIONAL TRUCK Introducing what isn't just the best truck we've ever built, but what might be the best truck anyone has ever built.BREAK NEW GROUND WITH THE 49XThe entire X-Series line of trucks was built from the ground up to bring toughness into the modern age with an impressive collection of engineering, technology and more than half a century of experience building trucks that take on any challenge, anywhere. So, whether you need a rugged vocational truck or a semi truck, and whether you've owned Western Star for years or will for the first time, it's time to break new ground with the 49X.FEATURESCHASSISBUILT FOR THE CHALLENGEThe heavy-duty vocational frame underneath the 49X is engineered to stand up to the demands of severe service applications.CABMAKING LEGENDARY PERFORMANCE LIGHTER AND SAFERConstructed from a premium-grade aluminum and enhanced with steel reinforcements.POWERTRAINPOWERED BY PROVEN PERFORMANCEWhether you're working on construction sites, in quarries, in logging, or even on the road, there's a Detroit engine option for your.UPFITENGINEERED FOR UPFITThe X-Series was created with Truck Equipment Manufacturers (TEMs) in mind. We designed the truck to ease body upfit for every type of truck including dump trucks, cement mixers, cranes, and engineered it with features to make it fast and simple to access wiring and add controls. POWER HOODWHERE LEGACY MEETS EVOLUTIONPower Hood combines the need of high power and the traditional hood style for the toughest and steepest terrain.PLANETARY AXLEEXPANDING HEAVY HAULMeritor P600 available in tandem or tridem configurations for heavy haul applications with GCWs of 200,000+ lbs.DOORSFORGED STEEL DOOR HINGESInternally mounted protection from the elements. Greater durability to prevent sagging -- a common problem with piano hingesROOFTRENCH-STYLE LOW ROOFComposite roof with a lowered center section enables optimized packaging of overcab equipment, giving you a purpose-built vehicle that minimizes overall vehicle height while maximizing interior headroom and door opening.UPTIMEOUR JOB IS TO KEEP YOU DOING YOURSOur X-Series trucks represent a big advancement in productivity for vocational trucks thanks to Detroit Connect®. Detroit Connect translates the performance data of any type of truck into real-time information you can use to make the decisions that can help you keep those trucks working and earning.CAB• X-Series steel-reinforced aluminum cab with X-Series steel door• Trench-style low roof with lowered center section for optimal packaging of over cab equipment• One-piece roped-in windshield• Optional impact-resistant and heated windshields available• Optional single or high-visibility three-piece rear windowINTERIOR TRIM LEVELSX-SERIES BASE• Mordura cloth seat• Vinyl sleeper upholstery• Standard insulation• Standard LED cab lighting• Black finish steering wheel switches• Black finish dash gauge bezels• Carbon with black trim accentsX-SERIES PREMIUM• Laredo leather seats• Upgraded sleeper upholstery• Premium insulation• Premium LED cab lighting• Bright finish steering wheel switches• Bright finish dash gauge bezels• Premium teak trimINTERIOR COLORS• Quarry Grey• Charcoal Black• Timber Brown (available on Premium Package only)HOOD• Impact-resistant, durable, lightweight molded resin hood with sloped high-visibility design• ISO TECH Hood Suspension System• Standard with locking hood strut• Optional Power Hood for high horsepower needs in set-forward axle configurationsGRILLERadiator-mounted steel grille with stainless steel surroundHVAC• Best-in-class HVAC with 5 face outlets, 4 floor outlets, 2 side window defrost outlets and 10 blower speeds• Available only on sleepers, optional Idle-Free Dual HVAC that provides up to 10 hours of cooling or 34 hours of heating when parkedAIR INTAKEEngine mounted air intake, plus optional hood-mounted pre-cleaner deliver improved dust capacityENGINE• Detroit® DD15®, 400-505 HP, 1550-1850 lb-ft• Detroit® DD16®, 500-600 HP, 1850-2050 lb-ft• Cummins X12, 350-500 HP, 1450-1700 lb-ft• Cummins X15, 400-605 HP, 1450-2050 lb-ftWestern Star provides a wide range of new vehicle engines compliant with EPA, CARB emissions, GHG, and OBD requirements.TRANSMISSION• Detroit® DT12®-V and Detroit® DT12®-VX• Allison Automatic 4000, 4500, 4700• Eaton Fuller Manual 10- 13- 18-speed; 8LL and 9ALL• Eaton Endurant AMT 12- 18 speedPOWER TAKE-OFFS (PTOS)• Intuitive and simple to use PTO control system that makes programming easy• FEPTO and REPTO available• Factory installed transmission PTOFRONT AXLE• Detroit® single 12,000-23,000 lbs• Detroit® tandem 36,000 and 40,000 lbs• Meritor single 12,000-22,000 lbsREAR AXLE• Detroit® single 23,000 lbs• Detroit® tandem 40,000-44,000 lbs• Dana tandem 52,000-60,000 lbs• Meritor single 21,000-30,000 lbs• Meritor tandem 40,000-84,000 lbs• Meritor tridem 69,000-126,000 lbsFRONT SUSPENSION• Flatleaf 14,600-23,000 lbs• Taperleaf 12,000-20,000 lbsREAR SUSPENSION• AirLiner® single 21,000-23,000 lbs• AirLiner® tandem 40,000-46,000 lbs• AirLiner® tridem 69,000 lbs• Chalmers tandem 40,000-70,000 lbs• Flatleaf single 23,000-30,000 lbs• Hendrickson tandem 40,000-52,000 lbs• Neway single 26,000 lbs• Neway tandem 46,000-52,000 lbs• Neway tridem 69,000-78,000 lbs• TufTrac tandem 40,000-52,000 lbsBRAKES• WABCO® 4S/4M and 6S/6M Anti-lock Braking System (ABS) with and without traction enhancement• Air Disc BrakesACTIVE SAFETY• Detroit Assurance® suite of safety systems including: Active Brake Assist 5, Adaptive Cruise Control to 0 MPH, Side Guard Assist, Tailgate Warning, Lane Departure Warning, Automatic Headlights/Wipers and Intelligent High Beams, Brake Hold Mode, Traffic Sign Display and Active Speed Intervention, available with Detroit® engines• WABCO® OnGuard including collision mitigation and adaptive cruise control, optional with Cummins enginesFRAME• Single-channel RBM @ 1.8-3.8MM inch-lbs• Inner C-channel reinforced RBM @ 4.4-5.5MM inch-lbs• 8"-30" parent rail front frame extensions options availableBUMPERS• 49X offers three bumper styles in various finishes and thicknesses, as well as a boxed-in bumper with an optional grille guard for logging applications. All 49X bumpers are tapered at the wheel ends for ground clearance and weight savings• Standard 1/8" stainless steel vocational• Optional 3/16" painted steel• Optional 1/4" plain or polished aluminum• Optional 5/16" bright steel severe service• Optional 3/8" painted steel severe service• Optional 1/4" painted or bright steel loggerFRONT TOW DEVICESThere are a number of towing device options mounted directly to the front frame head for increased strength and durability, with ratings from 80,000-140,000 lbs• Dual Removable Tow Hoops, 80,000 lbs• Center Tow Pin, 80,000 lbs• High Capacity Center Tow Pin, 140,000 lbsFUEL TANKS• Aluminum 25" cylindrical, plain or polished• LH 60-150 gallon (227-568 liter)• RH 60-, 70-, 80-, 100-, 120-, 150-gallon (227-, 265-, 303-, 379-, 454-, 569-liter)• Standard forward mounting; optional aft mounting• LH and RH split fuel/hydraulic tank options available• LH and/or RH auxiliary fuel supply and return ports availableDEF TANK• 8-, 13- and 23-gallon (23-, 49- and 87-liter)• Standard forward mounting• Optional LH or RH aft mountingUPFIT EFFICIENCY FEATURESAll-new QuickFit Interface System• Easier to integrate truck equipment with the vehicle's electrical power and communication sources• Advanced multiplexed electrical system for easy Truck Equipment Manufacturer (TEM) interface, programming and power access• Auxiliary in-cab backwall mounted E-Vault available, which houses: QuickFit Programmable Modules, QuickFit Programmable Interface Connector, TEM-specific power distribution module, High-current power accessSpecifications are subject to change without prior notice. Similar models may be shown in addition to the featured model. Equipment may be shown with options.