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Shasta Phoenix 373MBRB

Fifth wheelbuilt 2023– (in production)Mixed build tierCommon on the used market
WHAT ONE COSTS
$98,500MSRP today

Still in production. A used 2023 would run roughly $58,100.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~14,230 lbestimated as towed, for 2 people

dry weight 13,030 lb + fresh water (48 gal, full) 400 lb + propane + battery 200 lb + gear for 2 600 lb. Brochure dry weight omits water, propane, batteries and your gear; this estimate doesn't.

You want a tow rating around15,815 lb (10% margin)
GVWR (the sticker maximum)15,000 lb
Tongue weight, loaded~2,423 lb (17%)
Cargo capacity1,970 lb
WHICH TOW VEHICLES IT FITS: 19 OF 95

Judged the way the app judges: estimated loaded weight against each vehicle's rating less a 10% margin, per model year, because the 373MBRB's published weights held steady. Fifth wheels also need a pickup bed and are held to the fifth-wheel rating where published.

VEHICLETOW RATINGVERDICT
Chevrolet Silverado / GMC Sierra 2500HD (Duramax, max tow) '24-2622,500 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '20-2318,510 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '11-1918,100 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '20-2636,000 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '11-1923,300 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, gooseneck) '20-2222,800 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, tow pkg) '17-1918,000 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel) '11-1616,600 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 HO diesel, gooseneck) '23-2623,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '17-1932,500 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '20-2237,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '11-1621,600 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2638,000 lbfits, loaded, with 10% margin
Ford F-450 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2640,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins HO) '19-2620,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins) '11-1817,980 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins DRW, gooseneck) '13-1831,210 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '25-2636,610 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '19-2437,090 lbfits, loaded, with 10% margin
The 76it doesn't fit

These verdicts assume 2 people aboard with typical gear. See the margin for your truck and your crew →

THE SPECS
Length42.5 ft
Height (incl. A/C)13.0 ft
Width8.0 ft
Interior height7.1 ft
GVWR15,000 lb
Dry weight13,030 lb
Dry tongue weight2,219 lb
Cargo capacity1,970 lb
Sleeps9
Slide-outs5
Axles2
Fresh water48 gal
Grey water120 gal
Black water75 gal
Air conditioning27,000 BTU
Awning13 ft

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

WHERE PEOPLE SLEEP
  • 1× Front bedroom queen(Permanent)—
  • 1× Mid bunk(Permanent)—
  • 1× Sofa converts(Convertible)—
HOW IT'S BUILT: 5/5
WallsAzdel composite
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Shasta (Mixed tier): Shasta

YEAR BY YEAR: WHAT CHANGED
  • 2023Introduced
FINDING ONE

Common: usually several for sale within a day’s drive. Why: Shasta is a volume manufacturer; still in production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Mid-bunk, rear-bath five-slide. Heaviest dry weight in the line at 13,030 lb with only 1,970 lb left over.

OTHER PHOENIX FLOORPLANS
27RKSS · 12,000 lb · sleeps 627RL · 11,431 lb · sleeps 628BH · 11,760 lb · sleeps 928RB RISE · 12,160 lb · sleeps 628RL · 12,273 lb · sleeps 6298RLS · 12,000 lb · sleeps 430RL · 12,257 lb · sleeps 631BH · 12,353 lb · sleeps 1032RE · 11,834 lb · sleeps 6334FL · 15,000 lb · sleeps 6336RL · 13,500 lb · sleeps 433CK · 14,088 lb · sleeps 834RD · 14,361 lb · sleeps 8355FBX · 14,500 lb · sleeps 8the whole line →
Find one for sale

Live listings for the 373MBRB 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 Phoenix line ↗

Is the 373MBRB 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 dealer and aggregator listings, retrieved 2026-07.