Never Settle.

You’ve worked hard and earned the ability to explore new places and meet new people on your time. 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 in is core to Spartan RV Chassis. That’s why Newmar has partnered with us to raise the bar on the safety of their coaches.

The Newmar King Aire is built exclusively on the Spartan K3 605 chassis. Designed, engineered, and made in America with the finest components creating a premier foundation for the most discerning RV makers and owners.

Spartan RV 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 and uncompromising durability that was as smooth and quiet as it was safe and well-appointed. So, we built them the unique K3 605 chassis from the ground up. The highest-quality materials provide reliability and dependability, and constant innovation means you’re safe & secure. Spartan Chassis provides a comfortable customer experience, nationwide service, and the best warranty in the business.

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Premium Features

  • Comfort Drive ™ steering assist system with variable driver’s effort control feature
  • 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™ digital dash display
  • Passive steer tag axle
  • 20,000 lb towing capacity
  • Power tilt & telescoping steering column
  • SMART steering wheel with leather finish
  • Spartan Passive Keyless Start
  • Suspended adjustable pedals
  • Memory setting controls for seat, mirrors, pedals, and steering column for drivers 1 and 2
  • Air disc brakes at all wheel positions
  • Available CURT Spectrum™ trailer brake controller
  • K3 605 Chassis



Peak HP

605 hp @ 1800 RPM


292″ + 48″ tag

Towing Capacity

20,000 lb



Safety Innovations

Spartan Advanced Protection System – King Aire

Spartan Advanced Protection System® is the industry’s first and only comprehensive safety system engineered to keep your Newmar King Aire on the road, and safe… to enjoy every adventure.

  • Spartan Safe Haul™ The industry’s only factory-chassis integrated air supply for tow vehicle brake systems.
  • OnGuardACTIVE, Collision Mitigation with Adaptive Cruise Control alerts the driver of potentially dangerous driving scenarios and adjusts speed to maintain a safe following distance.
  • Electronic Stability Control (ESC) helps the driver maintain control of the coach in extreme steering maneuvers by automatically controlling individual brakes to help keep the coach moving in intended direction.
  • Automatic Traction Control (ATC) helps the driver maintain traction under the drive axle tires in slippery conditions by automatically applying brakes on the wheel end that is slipping. This helps transfer power to the wheel end with more traction.
  • Tire Pressure Monitoring System (TPMS) displays tire pressure and temperature for individual tires. The system will alert the driver if any tire pressure or temperature exceeds set thresholds. The system is expandable to monitor towed vehicles as well.
  • Mobileye, Lane Departure Warning with sign and pedestrian recognition warns the driver with visual and audible alerts. The system will alert the driver in real time, so necessary corrections can be made.
  • Connected Coach


Spartan Connected Coach


Parts Manuals

Operators Guides

Service Guides

Service Manuals

Wiring Manuals

Alternative Fuels


Ford Transit

RAM ProMaster