Newmar King Aire 4598
Class Abuilt 2016–19Better build tierPatient search 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
Length44.9 ft
Height (incl. A/C)13.3 ft
Width8.5 ft
Interior height6.9 ft
GVWR54,000 lb
Dry weight49,100 lb
Cargo capacity4,900 lb
Sleeps4
Slide-outs3
Fresh water105 gal
Grey water80 gal
Black water60 gal
Air conditioning45,000 BTU
Fuel200 gal
Engine / chassisCummins X15 605 hp diesel pusher · Spartan K3
GeneratorCummins Onan 12.5 kW diesel
A missing row means the maker never published that figure — unknown, not zero.
WHERE PEOPLE SLEEP
- 1× Rear king bed(Permanent)72×80
- 1× Hide-a-bed sofa(Convertible)—
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameSteel
RoofWalk-on
UnderbellyEnclosed
Newmar (Better tier): Newmar
YEAR BY YEAR — WHAT CHANGED
| YEARS | GVWR | DRY | MSRP |
|---|---|---|---|
| 2016 | 54,000 lb | 46,300 lb | — |
| 2017 | 54,000 lb | 47,650 lb | — |
| 2018 | 54,000 lb | 48,600 lb | — |
| 2019 | 54,000 lb | 49,100 lb | — |
- 2016Introduced with a 140 gal fresh tank
- 2018Engine to X15 605 hp, fresh tank to 105 gal
- 2020Discontinued
FINDING ONE
Patient search — weeks of watching, and probably some travel. Estimated from build volume and production span — not a count of live listings.
THE READ
Four model years spanning the 600 hp to 605 hp change.
OTHER KING AIRE FLOORPLANS
4501 · 54,000 lb · sleeps 44503 · 54,000 lb · sleeps 44507 · 54,000 lb · sleeps 44513 · 54,000 lb · sleeps 44518 · 54,000 lb · sleeps 44519 · 54,000 lb · sleeps 44521 · 54,000 lb · sleeps 54531 · 54,000 lb · sleeps 54533 · 54,000 lb · sleeps 44534 · 54,000 lb · sleeps 44536 · 54,000 lb · sleeps 44537 · 54,000 lb · sleeps 44540 · 54,000 lb · sleeps 74546 · 54,000 lb · sleeps 4the whole line →
Is the 4598 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 manufacturer spec sheets, retrieved 2026-07.