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Keystone Avalanche 320RS

Fifth wheelbuilt 2017–20Mixed build tierFindable on the used market
WHAT ONE COSTS
$43,300est. used (2020, 6 yr old)

Sticker was $70,479 in 2020. Out of production since 2020, so the used market is the only way to buy one. Estimate assumes a 2020 unit.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~12,863 lbestimated as towed, for 2 people

dry weight 11,513 lb + fresh water (66 gal, full) 550 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 around14,295 lb (10% margin)
GVWR (the sticker maximum)15,000 lb
Tongue weight, loaded~2,542 lb (20%)
Cargo capacity3,487 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 320RS'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
Length35.7 ft
Height (incl. A/C)13.2 ft
Width8.3 ft
GVWR15,000 lb
Dry weight11,513 lb
Dry tongue weight2,275 lb
Cargo capacity3,487 lb
Sleeps4
Slide-outs3
Axles2
Fresh water66 gal
Grey water83 gal
Black water49 gal
Air conditioning15,000 BTU
Awning16 ft

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

WHERE PEOPLE SLEEP
  • 1× front bedroom king bed(Permanent)—
  • 1× sleeper sofa(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Keystone (Mixed tier): Keystone RV

YEAR BY YEAR: WHAT CHANGED
  • 2017Introduced
  • 2020Discontinued
FINDING ONE

Findable: a few listed nationwide most weeks. Why: Keystone is a volume manufacturer. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Rear sofa triple slide from the late-2010s Avalanche range.

OTHER AVALANCHE FLOORPLANS
290RL · 14,000 lb · sleeps 6295RK · 15,000 lb · sleeps 2300RE · 15,000 lb · sleeps 4302RS · 15,000 lb · sleeps 4312RS · 15,000 lb · sleeps 4321RL · 15,000 lb · sleeps 4322RL · 15,500 lb · sleeps 4330RE · 14,300 lb · sleeps 4332MK · 15,000 lb · sleeps 4338GK · 15,500 lb · sleeps 4346FL · 16,500 lb · sleeps 6352BH · 15,500 lb · sleeps 8360FL · 16,500 lb · sleeps 6361TG · 15,500 lb · sleeps 9the whole line →
Find one for sale

Live listings for the 320RS 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 Avalanche line ↗

Is the 320RS 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.