Keystone Retreat 391FKSS
Travel trailerbuilt 2020–24Mixed build tierCommon on the used market
WHAT ONE COSTS
$36,500est. used (2024, 2 yr old)
Sticker was $53,519 in 2023. Out of production since 2024, so the used market is the only way to buy one. Estimate assumes a 2024 unit.
WHAT IT WEIGHS BEHIND YOUR TRUCK
~12,249 lbestimated as towed, for 2 people
dry weight 11,007 lb + fresh water (53 gal, full) 442 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 around13,610 lb (10% margin)
GVWR (the sticker maximum)13,350 lb
Tongue weight, loaded~1,513 lb (12%)
Cargo capacity2,343 lb
WHICH TOW VEHICLES IT FITS: 20 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 391FKSS's published weights held steady.
The 75it doesn't fit
- Chevrolet Colorado / GMC Canyon (2.7 Turbo HO, tow pkg) '23-26: over by ~5,319 lb loaded
- Chevrolet Colorado / GMC Canyon (2.8 Duramax) '15-22: over by ~5,319 lb loaded
- Chevrolet Silverado / GMC Sierra 1500 (6.2 V8, max tow) '19-26: over by ~279 lb loaded
- Chevrolet Silverado 1500 (max tow) '14-18: over by ~999 lb loaded
- Chevrolet Silverado EV (4WT) '24-26: over by ~999 lb loaded
- Chevrolet Suburban (5.3 V8, max tow) '21-26: over by ~4,779 lb loaded
- Chevrolet Tahoe (5.3 V8, max tow) '21-26: over by ~4,689 lb loaded
- Chevrolet Traverse (tow pkg) '18-26: over by ~7,749 lb loaded
- Chrysler Pacifica '17-26: over by ~9,009 lb loaded
- Dodge Durango (5.7 / 6.4 Hemi, tow pkg) '14-26: over by ~4,419 lb loaded
- Ford Bronco 4-dr (2.7 EcoBoost, tow pkg) '21-26: over by ~8,199 lb loaded
- Ford Expedition (3.5 EcoBoost, tow pkg) '25-26: over by ~3,609 lb loaded
- Ford Expedition (3.5 EcoBoost, tow pkg) '18-24: over by ~3,879 lb loaded
- Ford Explorer (3.0 EcoBoost, tow pkg) '20-26: over by ~7,209 lb loaded
- Ford F-150 (3.5 EcoBoost, max tow) '24-26: over by ~99 lb loaded
- Ford F-150 (3.5 EcoBoost, max tow) '15-20: over by ~369 lb loaded
- Ford F-150 (3.5 EcoBoost, max tow) '11-14: over by ~2,079 lb loaded
- Ford F-150 Lightning (max trailer tow) '22-26: over by ~3,249 lb loaded
- Ford Maverick (2.0 EcoBoost, 4K tow pkg) '22-26: over by ~8,649 lb loaded
- Ford Ranger (2.3 EcoBoost, tow pkg) '19-23: over by ~5,499 lb loaded
- Ford Ranger (2.7 EcoBoost, tow pkg) '24-26: over by ~5,499 lb loaded
- Ford Transit (HD tow pkg) '15-26: over by ~6,039 lb loaded
- GMC Acadia (tow pkg) '20-26: over by ~7,749 lb loaded
- GMC Hummer EV Pickup '22-26: over by ~5,499 lb loaded
- GMC Sierra EV '24-26: over by ~1,449 lb loaded
- GMC Yukon / Yukon XL (5.3 V8, max tow) '21-26: over by ~4,689 lb loaded
- Honda Odyssey '18-26: over by ~9,099 lb loaded
- Honda Passport (AWD) '19-26: over by ~7,749 lb loaded
- Honda Pilot (AWD, tow pkg) '16-26: over by ~7,749 lb loaded
- Honda Ridgeline (AWD) '17-26: over by ~7,749 lb loaded
- Hyundai Palisade (tow pkg) '20-26: over by ~7,749 lb loaded
- Hyundai Santa Cruz (2.5T AWD) '22-26: over by ~7,749 lb loaded
- Jeep Gladiator (3.6 V6, max tow) '20-26: over by ~5,319 lb loaded
- Jeep Grand Cherokee (5.7 Hemi) '11-21: over by ~5,769 lb loaded
- Jeep Grand Cherokee (WL, tow pkg) '22-26: over by ~6,669 lb loaded
- Jeep Grand Cherokee L (5.7 Hemi) '21-26: over by ~5,769 lb loaded
- Jeep Grand Wagoneer (Hurricane, max tow) '22-26: over by ~3,384 lb loaded
- Jeep Wagoneer (Hurricane, max tow) '22-26: over by ~3,249 lb loaded
- Jeep Wrangler Unlimited 4-dr (tow pkg) '18-26: over by ~9,099 lb loaded
- Kia Telluride (tow pkg) '20-26: over by ~7,299 lb loaded
- Land Rover Defender '20-26: over by ~4,869 lb loaded
- Land Rover Discovery '17-26: over by ~4,869 lb loaded
- Lexus GX 550 (tow pkg) '24-26: over by ~4,064 lb loaded
- Lexus LX 600 '22-26: over by ~5,049 lb loaded
- Mazda CX-90 (3.3 turbo, tow pkg) '24-26: over by ~7,749 lb loaded
- Mercedes-Benz Sprinter '19-26: over by ~5,499 lb loaded
- Nissan Armada (3.5 twin-turbo, tow pkg) '25-26: over by ~4,599 lb loaded
- Nissan Armada (tow pkg) '17-24: over by ~4,599 lb loaded
- Nissan Frontier (3.8 V6, tow pkg) '22-26: over by ~5,814 lb loaded
- Nissan Pathfinder (tow pkg) '22-26: over by ~6,849 lb loaded
- Nissan Titan (5.6 V8, tow pkg) '17-24: over by ~3,464 lb loaded
- Nissan Titan XD (Cummins diesel) '16-19: over by ~809 lb loaded
- Ram 1500 (3.0 Hurricane, max tow) '25-26: over by ~1,799 lb loaded
- Ram 1500 (5.7 Hemi eTorque, max tow) '19-24: over by ~774 lb loaded
- Ram 1500 (5.7 Hemi, max tow) '11-18: over by ~2,689 lb loaded
- Ram ProMaster '14-26: over by ~6,029 lb loaded
- Rivian R1S '22-26: over by ~5,319 lb loaded
- Rivian R1T '22-26: over by ~2,349 lb loaded
- Subaru Ascent '19-26: over by ~7,749 lb loaded
- Subaru Outback (XT / Wilderness) '20-26: over by ~9,099 lb loaded
- Tesla Cybertruck '24-26: over by ~2,349 lb loaded
- Tesla Model X (tow pkg) '16-26: over by ~7,749 lb loaded
- Tesla Model Y (tow pkg) '21-26: over by ~9,099 lb loaded
- Toyota 4Runner (4.0 V6) '11-24: over by ~7,749 lb loaded
- Toyota 4Runner (i-Force Max) '25-26: over by ~6,849 lb loaded
- Toyota Grand Highlander (i-Force Max) '24-26: over by ~7,749 lb loaded
- Toyota Highlander (tow pkg) '20-26: over by ~7,749 lb loaded
- Toyota Land Cruiser (i-Force Max) '24-26: over by ~6,849 lb loaded
- Toyota Sequoia (i-Force Max, tow pkg) '23-26: over by ~3,679 lb loaded
- Toyota Sienna '21-26: over by ~9,099 lb loaded
- Toyota Tacoma (i-Force Max, tow pkg) '24-26: over by ~6,399 lb loaded
- Toyota Tacoma (V6, tow pkg) '16-23: over by ~6,129 lb loaded
- Toyota Tundra (5.7 V8, tow pkg) '11-21: over by ~3,069 lb loaded
- Toyota Tundra (i-Force Max, tow pkg) '22-26: over by ~1,449 lb loaded
- Volkswagen Atlas (tow pkg) '18-26: over by ~7,749 lb loaded
These verdicts assume 2 people aboard with typical gear. See the margin for your truck and your crew →
THE SPECS
Length40.2 ft
Height (incl. A/C)12.6 ft
Width8.5 ft
GVWR13,350 lb
Dry weight11,007 lb
Dry tongue weight1,360 lb
Cargo capacity2,343 lb
Sleeps4
Slide-outs3
Axles2
Fresh water53 gal
Grey water78 gal
Black water39 gal
Air conditioning15,000 BTU
A missing row means the maker never published that figure: unknown, not zero.
WHERE PEOPLE SLEEP
- 1× King bed(Permanent)72×80
- 1× 72-inch sleeper sofa(Convertible)—
HOW IT'S BUILT: 2/5
WallsLaminated fiberglass
FrameWood
RoofStandard
UnderbellyEnclosed
Keystone (Mixed tier): Retreat Destination Trailer
YEAR BY YEAR: WHAT CHANGED
- 2020Introduced
FINDING ONE
Common: usually several for sale within a day’s drive. Why: Keystone is a volume manufacturer. Estimated from build volume and production span, not a count of live listings.
OUR TAKE
Laminated-sidewall front kitchen model.
OTHER RETREAT FLOORPLANS
391CLDL · 15,790 lb · sleeps 9391FDEN · 13,200 lb · sleeps 4391FLFT · 14,000 lb · sleeps 7391FLRS · 13,400 lb · sleeps 4391FLSL · 15,655 lb · sleeps 6391FSRL · 15,700 lb · sleeps 8391HBDL · 15,655 lb · sleeps 9391LOFT · 13,925 lb · sleeps 6391MBNK · 13,190 lb · sleeps 7391MKTS · 13,925 lb · sleeps 4391RDEN · 13,470 lb · sleeps 6391RS · 15,655 lb · sleeps 439CLDL · 15,772 lb · sleeps 939FDEN · 13,200 lb · sleeps 4the whole line →
Find one for sale
Live listings for the 391FKSS on the big marketplaces. Each search opens pre-filled with this exact floorplan:
Inventory varies by site and day. Slim pickings? search the whole Retreat line ↗
Is the 391FKSS 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.