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. Entegra Coach and Spartan RV Chassis partner to be co-pilots on the adventure of a lifetime.

Entegra’s Cornerstone is built on the 45’ Spartan RV Chassis 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 Chassis makes the only chassis built exclusively for motorhomes. We didn’t take the easy route and modify a heavy truck chassis for our partners at Entegra. 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 RV Chassis provides a comfortable customer experience, nationwide service, and the best warranty in the business.

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Premium Features

  • E-Z Steer for a smoother driver experience and reduced driver fatigue
  • 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® glare-free digital dash with 15’’ display
  • Passive steer tag axle
  • 3-stage engine compression brake
  • 20,000 lb towing capacity
  • Tri-Pod Steering Wheel with graphic instrument cluster navigation, screen view selection, wiper, phone, and media controls.
  • Suspended adjustable pedals
  • Air disc brakes at all wheel positions
  • Auto headlamps
  • Rain sensing wipers
  • NEW: Tilt Tank Drain Assist
  • K3 605 Chassis

Length

45′

Peak HP

605 hp @ 1,800 rpm

Wheelbase

320″

Towing Capacity

20,000 lb

Warranty

3-year/50,000 mile

Safety Innovations

Spartan RV Chassis Advanced Protection System – Cornerstone

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

Specifications

Brochures

Parts Manuals

Operators Guides

Service Guides

Service Manuals

Wiring Manuals

Alternative Fuels

Aeromate

Ford Transit

RAM ProMaster

Videos