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Palomino Columbus 366RL

Fifth wheelbuilt 2017–21Mixed build tierFindable on the used market
WHAT ONE COSTS
$47,700est. used (2021, 5 yr old)

Sticker was $74,642 in 2020. Out of production since 2021, so the used market is the only way to buy one. Estimate assumes a 2021 unit.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~13,622 lbestimated as towed, for 2 people

dry weight 12,196 lb + fresh water (75 gal, full) 626 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 around15,140 lb (10% margin)
GVWR (the sticker maximum)15,196 lb
Tongue weight, loaded~2,137 lb (16%)
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 366RL's published weights changed mid-run. 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
Length38.6 ft
Height (incl. A/C)12.3 ft
Width8.4 ft
GVWR15,196 lb
Dry weight12,196 lb
Dry tongue weight1,913 lb
Sleeps4
Slide-outs3
Axles2
Fresh water75 gal
Grey water71 gal
Black water39 gal

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

WHERE PEOPLE SLEEP
  • 1× Front queen bed(Permanent)60×80
  • 1× Sofa converts(Convertible)—
HOW IT'S BUILT: 5/5
WallsAzdel composite
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Palomino (Mixed tier): Palomino RV (Forest River / Berkshire Hathaway), Colon MI

YEAR BY YEAR: WHAT CHANGED
YEARSGVWRDRYMSRP
2017–1914,878 lb11,878 lb$74,642
2020–2115,196 lb12,196 lb$74,642
  • 2017Introduced at 14,878 lb GVWR
  • 2020GVWR raised to 15,196 lb; fresh tank to 75 gal
  • 2021Sold as 366RLC; roof height 162 in
FINDING ONE

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

OUR TAKE

Rear-living couples coach with a remarkably low 1,913 lb pin for its size.

OTHER COLUMBUS FLOORPLANS
295RL · 13,667 lb · sleeps 4297RK · 14,422 lb · sleeps 4298RL · 14,859 lb · sleeps 4299RL · 15,880 lb · sleeps 4320RS · 14,636 lb · sleeps 4325RL · 14,547 lb · sleeps 4328RL · 15,324 lb · sleeps 4329DV · 14,962 lb · sleeps 4340RK · 14,566 lb · sleeps 4365RL · 15,650 lb · sleeps 4374BH · 16,276 lb · sleeps 8375BH · 16,755 lb · sleeps 8376DS · 16,199 lb · sleeps 6377DS · 16,480 lb · sleeps 6the whole line →
Find one for sale

Live listings for the 366RL 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 Columbus line ↗

Is the 366RL 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.