CamperHardlyKnowHer

Newmar Mountain Aire 4584

Class Abuilt 2017–17Better build tierScarce on the used market
WHAT ONE COSTS
—price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

THE SPECS
Length44.8 ft
Height (incl. A/C)13.2 ft
Width8.5 ft
Interior height6.9 ft
GVWR54,000 lb
Dry weight44,500 lb
Sleeps5
Fresh water105 gal
Grey water65 gal
Black water45 gal
Fuel150 gal

A missing row means the maker never published that figure — unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× master bedroom bed(Permanent)—
  • 1× convertible dinette(Convertible)—
  • 1× sofa sleeper(Convertible)—
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameSteel
RoofWalk-on
UnderbellyEnclosed

Newmar (Better tier): Newmar Mountain Aire

YEAR BY YEAR — WHAT CHANGED
  • 2017Introduced
  • 2018Dropped
FINDING ONE

Scarce — months of watching; be ready to fly and drive it home. Why: only one model year. Estimated from build volume and production span — not a count of live listings.

THE READ

One-year 2017 45-footer.

OTHER MOUNTAIN AIRE FLOORPLANS
3823 · 54,000 lb · sleeps 53825 · 54,000 lb · sleeps 44002 · 54,000 lb · sleeps 54018 · 54,000 lb · sleeps 54118 · 54,000 lb · sleeps 54360 · 44,600 lb · sleeps 54361 · 44,600 lb · sleeps 54364 · 44,600 lb · sleeps 54369 · 44,600 lb · sleeps 54372 · 44,600 lb · sleeps 54501 · 53,000 lb · sleeps 54503 · 53,000 lb · sleeps 54513 · 54,000 lb · sleeps 54519 · 54,000 lb · sleeps 5the whole line →
Is the 4584 your #1 — or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about — set your priorities as sliders and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

Data compiled from dealer and aggregator listings, retrieved 2026-07.