2026 Newmar Summit Air 4505. This beast of a Super C diesel motorhome is rolling out soon, built for families or adventure seekers who want luxury without skimping on space. At 45 feet long, it’s got that big-RV vibe but packs in smart touches for easier driving. Newmar’s latest from their Summit line hits dealerships early next year, promising to turn heads on highways from California to the Keys. Let’s break it down—no fluff, just the good stuff.
Design
Picture this: a sleek Freightliner Cascadia chassis wrapped in options like the Onyx Black Out package or creamy Blanco paint. The 4505’s design is all about flow—three full slides open up the living space to feel like a cozy cabin, not a tin can. Inside, pick from woodsy decors like Alden or Wentworth, with maple cabinets that gleam under soft LED lights. The bunk floorplan shines here: flip-up bunks for the kids, a king-size bed that slides out smooth as butter, and a rear bath that’s basically a spa with tiled walls and a rain shower. Add leather theater seats and a hide-a-bed sofa, and you’ve got room for five to crash comfortably. It’s rugged outside, refined in—perfect for tailgating at a game or chilling by a lake.
Smarts Features
This isn’t your grandpa’s RV. The Summit Aire 4505 loads up on gadgets that handle the hassle. Up front, the Xite Dash rocks a 10-inch touchscreen with Apple CarPlay and a 360-degree camera that spots potholes before you do—think predictive lines like in fancy cars. Starlink internet keeps you streaming Netflix in the boonies, while a 10-inch multiplex panel controls lights, AC, and levels with a tap. Bose soundbars pump tunes through the cab and exterior entertainment spot, where a 43-inch outdoor TV waits for movie nights under the stars. Even the three 15K BTU air conditioners run whisper-quiet, and keyless entry means no fumbling for keys after a campfire. It’s like having a tech-savvy co-pilot who never complains.
Mileage
Power? The 600-horsepower Detroit DD16 engine with 1,850 lb-ft of torque hauls this 45-footer like it’s nothing, towing up to 30,000 pounds for your boat or toys. Fuel tank’s a hefty 120 gallons, so you won’t be hunting stations every hour. Now, mileage—real talk, these big diesels sip, not gulp. Expect 6-8 MPG on highways, depending on load and wind. That’s solid for the class; it’ll get you 700-900 miles per fill-up, enough to cross states without drama. Paired with auto-leveling jacks, it parks itself level on uneven gravel, saving your back.
Price
Dream big, but budget smart—the 4505 starts at around $907,000 MSRP, climbing to $1 million-plus with extras like custom paint or solar panels. That’s steep, sure, but compare it to a yacht or cabin, and it makes sense for year-round escapes. Financing runs like a home loan, and Newmar’s warranty sweetens the deal. Hit a dealer soon; these won’t sit long.