DEPENDABILITY NEVER GOES OUT OF STYLE.

The 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.

49x RESOURCES

49X ENGINES

Detroit DD15

Detroit DD16

Cummins X12

Cummins X15

49X SPECIFICATIONS

STANDARD OPTIONS
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 window
Interior Trim Levels – X 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 accents
Interior Trim Levels – X-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 trim
Interior 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 configurations
Grille Radiator-mounted steel grille with stainless steel surround
Air Intake Engine mounted air intake, plus optional hood-mounted pre-cleaner deliver improved dust capacity
Engine  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-ft
Transmission Detroit® DT12®-V and Detroit® DT12®-VX
  • Allison Automatic 4000, 4500, 4700
  • Eaton Fuller Manual 10- 13- 18-speed; 8LL and 9ALL
  • Eaton Ultrashift PLUS and Endurant AMT
Front Axle  Detroit® single 12,000-23,000 lbs
  • Detroit® tandem 36,000 and 40,000 lbs
  • Meritor single 12,000-22,000 lbs
Rear 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 lbs
Front Suspension Flatleaf 14,600-23,000 lbs Taperleaf 12,000-20,000 lbs
Rear 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 lbs
Brakes WABCO® 4S/4M and 6S/6M Anti-lock Braking System (ABS) with and without traction enhancement Air Disc Brakes
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 engines
Frame 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 available
Fuel 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 available
DEF Tank 8-, 13- and 23-gallon (23-, 49- and 87-liter) Standard forward mounting

Optional LH or RH aft mounting

49X SLEEPERS & INTERIORS

49X SEAT FABRIC

x series seat quarry grey

x series seat quarry grey

charcoal black

Charcoal Black

Quarry Grey Mordura

Quarry Grey Mordura

Charcoal Black Mordura

Charcoal Black Mordura

Timber Brown Mordura

Timber Brown Mordura

Quarry Grey Diamond

Quarry Grey Diamond

Charcoal Black Diamond

Charcoal Black Diamond

Timber Brown Diamond

Timber Brown Diamond

49X VIDEOS