Newmar King Aire 4584

Name: Newmar King Aire 4584
Brand: Newmar

Class Abuilt 2012–17Better build tierPatient search on the used market

WHAT ONE COSTS

$496,000est. used (2017, 9 yr old)

Sticker was $887,250 in 2017. Out of production since 2017, so the used market is the only way to buy one. Estimate assumes a 2017 unit.

THE SPECS

Length44.9 ft

Height (incl. A/C)13.3 ft

Width8.5 ft

Interior height7.0 ft

GVWR54,000 lb

Dry weight47,650 lb

Cargo capacity6,350 lb

Sleeps4

Slide-outs3

Fresh water140 gal

Grey water80 gal

Black water60 gal

Air conditioning45,000 BTU

Fuel200 gal

Engine / chassisCummins ISX15 600 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
2012–13	54,000 lb	45,050 lb	$887,250
2014	54,000 lb	46,900 lb	$887,250
2015–17	54,000 lb	47,650 lb	$887,250

2012Introduced on the Spartan K2 with the 600 hp ISX
2014UVW to 46,900 lb
2015Not offered
2016Reintroduced
2018Discontinued

FINDING ONE

Patient search: weeks of watching, and probably some travel. Why: priced at the top of its maker’s range. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Ran in 2012-2014 and again in 2016-2017; one of the longest-lived King Aire codes.

OTHER KING AIRE FLOORPLANS

4501 · 54,000 lb · sleeps 4 4503 · 54,000 lb · sleeps 4 4507 · 54,000 lb · sleeps 4 4513 · 54,000 lb · sleeps 4 4518 · 54,000 lb · sleeps 4 4519 · 54,000 lb · sleeps 4 4521 · 54,000 lb · sleeps 5 4531 · 54,000 lb · sleeps 5 4533 · 54,000 lb · sleeps 4 4534 · 54,000 lb · sleeps 4 4536 · 54,000 lb · sleeps 4 4537 · 54,000 lb · sleeps 4 4540 · 54,000 lb · sleeps 7 4546 · 54,000 lb · sleeps 4 the whole line →

Find one for sale

Live listings for the 4584 on the big marketplaces. Each search opens pre-filled with this exact floorplan:

RV Trader ↗Camping World ↗FB Marketplace ↗Google ↗

Inventory varies by site and day. Slim pickings? search the whole King Aire 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, switch on your hard limits, and watch the whole market re-rank around them. Every exclusion explained, every margin shown.

See where it ranks for you →

Data compiled from manufacturer spec sheets, retrieved 2026-07.