600HP Luxury on Wheels – 2026 Newmar Summit Aire

Transwest Truck Trailer RV
Lance Ortega (208)290-5750
2026 Newmar Summit Aire 4505

The 2026 Newmar Summit Aire 4505 is one of the most powerful, luxurious Super C motorhomes ever built. Sitting on the Freightliner Cascadia P126 chassis, this coach is powered by the legendary Detroit Diesel DD16 producing 600 horsepower and 1,850 lb-ft of torque, delivering true Class 8 performance with residential-level comfort.
Inside, Newmar brings its renowned craftsmanship to the Super C segment with premium hardwood cabinetry, solid surface countertops, tile flooring, and a residential kitchen designed for full-time or extended travel. The spacious bath-and-a-half floorplan, king bed suite, and high-end finishes make the Summit Aire 4505 feel more like a luxury condo than a motorhome.
With massive towing capacity, advanced safety technology, and Newmar’s industry-leading build quality, the Summit Aire 4505 is built for RVers who want no compromises—power, comfort, and prestige all in one coach.

2026 Newmar Summit Aire 4505

Chassis & Power
Freightliner Cascadia P126 chassis
Detroit Diesel DD16
600 HP
1,850 lb-ft of torque
Allison automatic transmission
Air ride suspension
Engine brake (Jake brake)

Dimensions
Length: approx. 45 ft
Exterior height: approx. 13 ft 5 in
Exterior width: 102 in

Towing & Capacities
Hitch rating: up to 20,000 lbs
Fuel capacity: approx. 120 gallons
DEF capacity: approx. 13 gallons
Fresh water: approx. 105 gallons
Gray water: approx. 75 gallons
Black water: approx. 55 gallons

Interior & Living
Bath and a half floorplan
King bed in master suite
Residential refrigerator
Induction cooktop
Convection microwave
Solid surface countertops
Tile flooring throughout
Premium Newmar hardwood cabinetry
Theater seating
Multiple LED TVs

Climate & Systems
Starlink
4 Merlin Solar Panels
Aqua-Hot hydronic heating
Triple roof A/Cs with heat pumps
50-amp electrical service
Onan diesel generator
Lithium battery option
Inverter system
Safety & Technology
Adaptive cruise control
Collision mitigation
Lane departure warning
Blind spot monitoring
360° camera system
Power shades
Multiplex lighting control
Why the Summit Aire 4505 Stands Out
True 600HP Class 8 Super C
Massive torque for mountain towing
Newmar luxury fit & finish
Residential comfort with commercial-grade strength
One of the most exclusive Super C motorhomes on the road


Music Credits
Don't Wanna Let Myself Down (Instrumental) - NEFFEX
Music provided by YouTube Audio Library