2026 45' Newmar Supreme Aire XT 4505 | Stock #8452

2026 IWS Signature Series™ Newmar Supreme Aire XT 4505 – Stock #8452

On Order – Arriving September 2025

A little about this Supreme Aire XT 4505:

It’s the moment we have all been waiting for. The 2026 Newmar Supreme Aire XT is now built on the Freightliner P4 Cascadia chassis! After years of waiting, it’s finally here, and we couldn’t be more excited!

We are proud to present the Supreme Aire XT as an IWS Signature Series™ build. When you see the IWS Signature Series™ label, you know that it’s the best of the best. Built on the Freightliner P4 Cascadia 126 chassis, mated with the Detroit Diesel DD16 Engine with 600hp and 1,850 ft lb. of torque. We ordered this one with the Detroit DT12 12 Speed Automated Manual Transmission which is our favorite transmission for towing performance. Speaking of towing, this coach features a 30,000 lb. towing capacity with tandem rear axles leading the way. This is a beast of a powertrain that can handle anything you throw at it. It also has the Detroit Safety Assurance collision mitigation system, that features lane departure warning, blind spot monitoring, adaptive cruise control, and adaptive brake assistance.

This coach sits at a 45’ in total length, and features the 4505 bath and a half floorplan. This is our favorite 45’ Floorplan out there. We call this the “Epic” floorplan. This floorplan is excellent for those that want to go to a destination and stay for a while. We love the amount of seating options with the euro booth dinette, the theater seats, and the opposing sofa. There is so much room in this coach!

Being an IWS Signature Series™ build, we picked over $97,000 in options on this one. Some of these options we ordered are through the Newmar Specials program, which you can’t get on the standard option sheet. A few of the major options include:

Laughton Paint Design with Onyx Blackout Package– We designed this coach to have the Laughton paint design with the Onyx Blackout Package. We saw this shown at the Newmar dealer meeting this year, and it was a showstopper. The blackout package covers the wheels, grill, door handles, mirror covers, and more. This coach is going to look bad ass! ($15,000 option)

Theater Seating and Euro Booth Dinette in lieu of Sleeper Sofa and Dinette – A personal favorite combination of ours. We designed this floorplan for couples that are looking for the most luxurious, comfortable floorplan on the market. The theater seats are the most comfortable seats for the Supreme Aire, and we love the Euro Booth versatility where if you do have 4 people over for dinner one night, its easy to convert to 4 seats. This also has a 58” tri-fold sofa for opposing seating. ($5,400 in options)

Sleep Number King Bed – The most comfortable bed option we offer in the Super C lineup. This sleep number bed allows each person to set their own firmness on their side of the mattress. ($2,100 option)

Electric Radiant Floor Heat– This is an absolute must have option. Nothing better than waking up in the morning with warm tile. Also helps in winter use for 4-season traveling. ($10,000 option)

Lithium Battery Upgrade Package – This gives you 940-amp hours of lithium batteries, and (2) 3,000-watt inverters over the standard 6-volt batteries, and single inverter. We wouldn’t order a Supreme Aire without this package! ($30,000 option)

Two-Tone Hardwood Cabinets – For 2026 Newmar is offering a two-tone cabinet design, and we couldn’t say no as its one of the best-looking cabinet designs we have seen in a Super C! This coach has the Summit / Sable Glazed Maple Design with Suede Finish. ($1,800 option)

Starlink Internet – Satellite Internet with the high-performance wedge mount. Comes built in with a router. Our preferred choice for internet on any motorcoach. ($5,593 option)

You can put your name on it with a 10% deposit. Give us a call, and we can tell you even more about it, and the process of making it your coach. See you out on the road!

Written by Ben Ceccarelli

Standard Chassis Features

IWS Signature Series™ Freightliner Cascadia P4-126 (Tandem Rear Axle)
600hp DD16 Detroit Diesel Engine 1,850 ft. lb. Torque
Detroit DT12 12 Speed Detroit Automated Manual Transmission
GVWR 58,000lb / GCWR 80,000lb
Includes the Detroit Safety Assurance Collision Mitigation System
Full Double Steel Frame Construction (7/16″ Thick Steel)
1400 sq Inch Aluminum Radiator for Heavy Duty Applications
300 AMP Brushless Pad Mount Alternator for House Battery Charging while Driving
Bendix Air Disc Front and Rear Brakes
Michelin X Line Energy Z 315/80R22.5 20 Ply Radial Front Tires
Michelin X Line Energy Z 295/80R22.5 16 Ply Radial Rear TiresDriver Controlled Locking DifferentialLED Headlights
Anti Lock Braking System
Chassis Battery Disconnect
Electronic Stability Control
Air Horns
Engine Block Heater
Power and Heated Remote Control Mirrors
Power Window and Power Door Locks
Electronic Cruise Control
18″ Leather Wrapped Steering Wheel with Tilt & Telescoping Features
Tire Pressure Monitor
5 Year/100,000 mile Chassis Warranty
5 Year/100,000 mile Engine Warranty
5 Year/Unlimited miles Transmission Warranty
Note – Chassis Specs Are Subject to Change Without Notice

Standard Exterior Features

Gelcoated Fiberglass Exterior Sidewalls, Front and Rear Caps
One Piece Fiberglass Roof and Integrated Gutter Rails
Aluminum Framed Sidewalls and Roof Construction with 16′ on Center Cross Members
Convex Exterior Mirrors with Defrost and Remote Control
Chrome Exterior Mirrors
Keyless Entry with Key Pad and Doorbell for Front Entry Door
Morryde Side Swing Baggage Doors; with Remote Lock / Unlock Painted Paddle Latches
LED Lights Inside Of Storage Compartments
Large Entry Door Assist Handle
Radius RV Entrance Door w/Screen and Deadbolt
Fiberglass Molded Tank Covers and Cab Entry Steps
Automatic Electric Triple Entrance Step
Mud Flaps Behind Rear Wheels
Undercoat Underside of Coach
Newmar Signature Fiberglass Rear Cap with Stainless Steel Exterior Trim Pieces with Storage
Newmar Signature Fiberglass Front Cap and Transition
Chrome LED Docking lights on Rear Wheel Skirts & Rear Bumper
Egress Door with Ladder System

EXTERIOR LIGHTING

High Intensity Exterior LED Security Light, One Installed on Passenger Side
Mid-Ship Side Turn Signals
Exterior LED Accent Lights Underneath Curb Side Slides (Solid Color)
Exterior LED Accent Lights Underneath Road Side Slides (Solid Color)

HITCHES AND TOWING

30,000lb. Adjustable Hitch with 2″ Reducer and Drawbar with 2″ and 2″-5/16″ Ball (3,000lb. Tongue Rating)
Rear Protective Full Width Mudflap with Stainless Steel Newmar Logo
Electronic Trailer Brake Controller Prep

INSULATION

5/8″ Bead Foam Insulation Laminated in Ceiling in Conjunction with Polar Pak Batten Insulation and Kraft Vapor Barrier (R-19 Roof Value)
5/8″ Bead Foam Insulation Laminated in Sidewall in Conjunction with Polar Pak Batten Insulation and Kraft Vapor Barrier (R-11 Sidewall Value)
5/8″ Floor Decking in Conjunction with Polar Pak Batten Insulation and Polyethylene Moisture Barrier (R-16 Floor Value)
Insulated Basement and Cargo Compartments (R-4 Basement Value)

PAINT AND APPEARANCE:

Full 4 Color Paint with Masterpiece™ Graphics with Clearcoat Finish
Laughton Full Painted Exterior Graphics

SLIDE OUTS

Automatic Mechanical Lock Arms on Slideout Rooms-Scissor Style
HWH Premium Flush Floor Slide with Tile Floor
Newmar Signature Hardwood Slidout Fascia
Removable Transport Pads for Under Slideout Rollers
Awning Slide Toppers on All Slide Outs

AWNINGS

Girard Rooftop Mounted Awning (Single Stage)

WINDOWS

Skylight over Shower
Window Treatment- Fabric Valance over the Top of Window
Bonded Thermopane Frameless Vented Windows
Sky Window with Power Shade integrated in Aerodynamic Front Cap

Added Exterior Options

Onyx Blackout Package
Flagpole Bracket
(2) Girard Nova Roof Mounted Awnings (Two Stage) Ilo Standard
Power Operated Day/ Night Roller Shades with Auto Motion Feature
60″ x 15″ Window in Kitchen

Standard Interior Features

7′ Interior Height
Premium Padded Vinyl Ceiling with Designer Feature Panels
Cab Rail Privacy Curtains
Decorative Wall Coverings with Accent Coverings in Slide Out Rooms
Hardwood Raised Panel Design Interior Passage Doors
Interior Assist Handle at Main Entry Door
Power Stepwell Cover
Quilted Bedspread with Accent Pillows
Wastebasket in Kitchen Base Under Sink
Shoe Storage Shelves Recessed in Rear Cap of Wardrobe
Cathedral Ceiling in Rear

FURNITURE

Designer Bedspread with Pillows
Deluxe Padded Headboard
Air Ride Driver and Passenger Seats with Pneumatic Lumbar Support
Lifts on Bed Top

CABINETS

Concealed Hinges on Cabinet Doors
Molded Silverware Divider Tray
Soft close Full Extension Ball Bearing Drawer Guides Throughout
Cedar Lined Rear Closet
Pull-Out Pantry Shelves with Travel Latch

FLOORING

Tile Flooring Throughout Entire Coach. Includes Living Room, Kitchen, Hallway, Bathroom, and Bedroom
Tiled Entry Step Area

COUNTER TOPS

Polished Solid Surface Kitchen Countertops
Stainless Steel Deep Bowl Kitchen Sink with Solid Surface Covers
Polished Solid Surface Countertop in Bathroom and Bedroom

APPLIANCES

Whirlpool® 19.7 Cf. Refrigerator
All Electric Flush Mount Induction Cooktop with Matching Countertop Cover
Stainless Steel Convection Microwave Oven
Washer/Dryer Prep

Added Interior Options

Saguaro Interior Décor Package
Electric Radiant Heated Floors
Safe Located In Bedroom Wardrobe
Dinette Euro Booth with 2 Table Leaves and 2 Folding Chairs
87″ Powered Theater Seating with Reading Lights and Lighted Cup Holders
Sleep Number R5 Radius Corner Air Mattress
Hardwood Cabinets – Two-Tone Color: Summit/Sable Glazed Maple (Suede Finish)
Central Vacuum with Tool Kit
Splendide® Two-piece Stacked Washer/Dryer
Freezer Electrical Prep (110V and 12V) Without Tray

Standard Water System Features

Porcelain Electric Macerator Toilet
Water Heater Bypass System
60 Gal Gray Waste Storage Tank & 40 Gal Black Waste Storage Tank.
150 Gallons Fresh Water Storage Tank
12 Volt Black and Gray Tank Dump Valves
Water Management Systems Monitor Panel
Black Tank Flush
Whole House Water Filtration
Aqua Miser Shower System
Solid Surface Shower with Tile Inlay and Glass Door

Added Water System Options

Fold Down Shower Seat
Hot Water Line Run to Front Door Side Storage Bay

Standard Mechanical Features

Chinook Dual Loop Heat with Continuous Hot Water
Fan-Tastic Vent with Rain Sensor in Kitchen and Bathroom
4-Point Auto Leveling System
(3) 15,000 BTU Low Profile Roof A/C w/Heat Pumps
Ducted Heating and Air Conditioning
LP/CO & Smoke Detectors, Fire Extinguisher
Roof A/C Purge Pumps with Condensation Lines to bottom of coach
Wall Mounted Temperature Sensors for Heating and A/C
5 KW Onan Quiet Diesel Generator
Battery Disconnect Switch for House Batteries
10 Watt Solar Panel to Charge Chassis Batteries
Solar Prep With 6 Gauge Wire Ran From The Roof To House Battery Compartment
Automatic Generator Start System
50 AMP Electrical Service with Flexible Cord on Power Cord Reel with Automatic Transfer Switch and Surge Protector
Multiplex Electrical and Lighting System with LCD Display Touch Screen
Secondary Multiplex Touch Screen in Bedroom
USB/110V Charging Outlets at Bedroom Nightstands and Dinette
Emergency Engine Start Switch
USB Outlet at Dash for Driver Use
Manually Operated Hold-To-Run Slideout Switch
Spare Fuses in Chassis and House Fuse Panels
Energy Management System
Dimmable/Adjustable Reading Lights at Head of Bed
Energy Efficient LED Flush Mount Ceiling Lighting Throughout
Interior Courtesy Lights
LED Accent Lights in Feature Ceiling, Slideout Fascia Trim and Lambrequins
LED Lighting in Pull-Out Pantry, Kitchen and Bathroom Base Cabinets
LED Lights Installed Under Door Slide Slideouts
110 Volt Receptacle in Bed Overhead with Two Pass-Through Ports
LED Lights in Wardrobe Closet

Added Mechanical Options

Lithium Battery Upgrade Package ($29,946 Option)
- Lithium Ion 940 Amp Hour Battery System
- (2) 3,000 Watt Inverters
50 Amp Receptacle Run from Generator to the Rear Compartment on the Road Side

Standard Electrical Features

Samsung LED 4K TV in Living and Bedroom Areas (TV Sizes Vary Per Floor Plan)”
Bose Soundbar System
Bose Subwoofer
Cascadia Infotainment System
(2) Bedroom Radio Speakers
Exterior Entertainment Ctr. w/ Samsung 43″ LED TV and Soundbar in Storage Compartment
Color Rear and Side View Cameras
Xite Hd 360 Camera System with Grid Lines and Tri-View Rear Camera with Xite Radio
Cat 6 TV Cables
CB Radio Prep with Antenna
12 Volt Auxiliary Receptacle on Dashboard
Cable TV Connection
Winegard Digital Crank-Up TV Antenna
Satellite Dish Prep on Roof
Infrared Repeater System to Operate Audio/Visual Components
Exterior Park Cable Hookup with 110 Volt Receptacle and TV Jack in Storage Compartment
Winegard Rayzar Automatic Digital TV Antenna

Added Electrical Options

Sirius/XM Satellite Radio Capability with Antenna (Requires Customer Subscription)
(2) Rear Camera Prep for Use with a Trailer
Starlink Internet System with High Performance Wedge Mount

IWS Installed Items

NEWMAR SPECIALTY ITEMS:

Add Interior Grab Handle inside of Entrance
Vent Microwave to Exterior Wall
All Gray Paint Design (Single Color)
*Note – Prices and Specifications are subject to change at Newmar’s discretion without notice or obligation*

This 2026 Newmar Supreme Aire comes with the IWS Advantage Package!

Advantage Package

5 years free roadside assistance.
Your motorcoach will be filled with fuel at delivery.
Your motorcoach will be filled with propane at delivery.
New Apple iPad 32GB with Cellular & WiFi Capabilities with a protective case.
Exclusive IWS video library showing you how to use all of the features of your new motorcoach, preloaded onto a new iPad.
Exclusive access to the Member’s Only section of our website.
Exclusive 24 hour access to our service department, 7 days a week.
Exclusive one-on-one training on how to use, service, and maintain your new motorcoach.
Free night stay at our exclusive RV Park.

This Coachs' Floorplan

Supreme Aire 4505 with Theater Seats

This Floor plan may show optional features that are not on every unit.

Sorry, no videos at this time.

*Please note that due to changes at factory, specifications, dimensions, features, and options may change at anytime without notice*

Supreme Aire XT Specifications
FLOORPLAN	4505
OVERALL WIDTH	101.5”
OVERALL HEIGHT (to top of AC)	13′3”
OVERALL LENGTH	45’
INTERIOR HEIGHT	84″
FUEL CAPACITY	120 Gallons
FRESH WATER (gal)	150 Gallons
BLACK (gal)	40 Gallons
GRAY (gal)	60 Gallons
GVWR	58,000 lbs
Towing Capacity	30,000 lbs

Due to continued improvement, changes in suppliers and design; features, options, appliances, equipment, colors, material specifications, prices, and model availability are subject to change without notice.

Supreme Aire

IWS Signature Series™ 2026 45' Newmar Supreme Aire XT 4505