Never Settle.

You’ve earned the right to explore new places and meet new people. We’re here to make sure your journey is safe, smooth, and always first class. As the industry leader in chassis-centric innovations, improving the safety culture is core to Spartan RV Chassis. That’s why Newmar has partnered with us to raise the bar on safety on their coaches.

The Newmar Essex is available exclusively on the Spartan RV Chassis K3 605 chassis. Spartan RV Chassis is designed, engineered, and made in America with the finest components creating a premier foundation for the most discerning RV makers and owners.

Spartan RV Chassis makes the only chassis built exclusively for motorhomes. We didn’t take the easy route and modify a truck chassis for our partners at Newmar. We knew they wanted an unmatched ride that was as smooth and quiet as it was invigorating and well-appointed. So, we built them the unique K3 605 chassis from the ground up. The highest-quality materials provide reliability and dependability, along with nationwide service, and the best warranty in the business.

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Premium Features

  • Comfort Drive™ steering assist system w/ variable driver’s effort control feature
  • Power tilt & telescoping steering column
  • Independent front suspension
  • Electronic suspension control system with self-leveling feature including air compressor for extended stays
  • Automatic heated moisture ejectors with color-coded lanyards
  • Side-mounted service center
  • Connected Coach® 12.3” glare-free digital dash display
  • Passive steer tag axle
  • Headlamps with auto on/off feature
  • Tilt Tank Drain Assist
  • Heavy Haul trailer mode
  • 3-stage engine compression brake
  • 20,000 lb towing capacity
  • Tri-Pod Steering Wheel with leather finish, phone, and media controls
  • Spartan RV Chassis Passive Keyless Start
  • Memory setting control for mirrors, pedals & steering column for drivers one and two
  • Suspended adjustable pedals
  • Air disc brakes at all wheel positions
  • Available CURT Spectrum™ trailer brake control
  • 20-Year Transferable Warranty on Frame & Cross Members
  • 5-year/100,000-mile transferable warranty
  • 5-year/100,00-mile Cummins Engine warranty
  • 5-year/200,000-mile Allison Transmission warranty
  • K3 605 Chassis



Peak HP

605 hp @ 1,800 rpm


292″ + 48″ tag

Towing Capacity

20,000 lb



Safety Innovations

Spartan® RV Chassis Advanced Protection System™ (APS) – Essex

  • Automatic Traction Control (ATC)
  • Adaptive Cruise Control (ACC)
  • Electronic Stability Control (ESC)
  • Collision Mitigation System (CMS)
  • Mobileye® visual & audible lane departure warning
  • Tire Pressure Monitoring System (TPMS)
  • Spartan RV Chassis Safe Haul® (The industry’s premier factory chassis integrated air supply for tow vehicle brake systems.)



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Alternative Fuels


Ford Transit

RAM ProMaster