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Gulf Stream Trailmaster 266RBS

Travel trailerbuilt 2019– (in production)Caution build tierCommon on the used market
WHAT ONE COSTS
$50,300MSRP today

Still in production. A used 2023 would run roughly $26,600.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~7,382 lbestimated as towed, for 2 people

dry weight 6,290 lb + fresh water (35 gal, full) 292 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 around8,205 lb (10% margin)
GVWR (the sticker maximum)9,450 lb
Tongue weight, loaded~763 lb (10%)
Cargo capacity3,160 lb
WHICH TOW VEHICLES IT FITS: 49 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 266RBS's published weights changed mid-run.

VEHICLETOW RATINGVERDICT
Chevrolet Silverado / GMC Sierra 1500 (6.2 V8, max tow) '19-2613,300 lbfits, loaded, with 10% margin
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
Chevrolet Silverado 1500 (max tow) '14-1812,500 lbfits, loaded, with 10% margin
Chevrolet Silverado EV (4WT) '24-2612,500 lbfits, loaded, with 10% margin
Chevrolet Suburban (5.3 V8, max tow) '21-268,300 lbfits, loaded, with 10% margin
Chevrolet Tahoe (5.3 V8, max tow) '21-268,400 lbfits, loaded, with 10% margin
Dodge Durango (5.7 / 6.4 Hemi, tow pkg) '14-268,700 lbfits, loaded, with 10% margin
Ford Expedition (3.5 EcoBoost, tow pkg) '25-269,600 lbfits, loaded, with 10% margin
Ford Expedition (3.5 EcoBoost, tow pkg) '18-249,300 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '24-2613,500 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '15-2013,200 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '21-2314,000 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '11-1411,300 lbfits, loaded, with 10% margin
Ford F-150 Lightning (max trailer tow) '22-2610,000 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
GMC Sierra EV '24-2612,000 lbfits, loaded, with 10% margin
GMC Yukon / Yukon XL (5.3 V8, max tow) '21-268,400 lbfits, loaded, with 10% margin
Jeep Grand Wagoneer (Hurricane, max tow) '22-269,850 lbfits, loaded, with 10% margin
Jeep Wagoneer (Hurricane, max tow) '22-2610,000 lbfits, loaded, with 10% margin
Lexus GX 550 (tow pkg) '24-269,096 lbfits, loaded, with 10% margin
Nissan Armada (3.5 twin-turbo, tow pkg) '25-268,500 lbfits, loaded, with 10% margin
Nissan Armada (tow pkg) '17-248,500 lbfits, loaded, with 10% margin
Nissan Titan (5.6 V8, tow pkg) '17-249,760 lbfits, loaded, with 10% margin
Nissan Titan XD (Cummins diesel) '16-1912,710 lbfits, loaded, with 10% margin
Ram 1500 (3.0 Hurricane, max tow) '25-2611,610 lbfits, loaded, with 10% margin
Ram 1500 (5.7 Hemi eTorque, max tow) '19-2412,750 lbfits, loaded, with 10% margin
Ram 1500 (5.7 Hemi, max tow) '11-1810,620 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
Rivian R1T '22-2611,000 lbfits, loaded, with 10% margin
Tesla Cybertruck '24-2611,000 lbfits, loaded, with 10% margin
Toyota Sequoia (i-Force Max, tow pkg) '23-269,520 lbfits, loaded, with 10% margin
Toyota Tundra (5.7 V8, tow pkg) '11-2110,200 lbfits, loaded, with 10% margin
Toyota Tundra (i-Force Max, tow pkg) '22-2612,000 lbfits, loaded, with 10% margin
The 46it doesn't fit

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

THE SPECS
Length30.4 ft
Height (incl. A/C)11.3 ft
Width8.0 ft
Interior height6.7 ft
GVWR9,450 lb
Dry weight6,290 lb
Dry tongue weight650 lb
Cargo capacity3,160 lb
Sleeps6
Slide-outs1
Axles2
Fresh water35 gal
Grey water67 gal
Black water33 gal
Air conditioning13,500 BTU

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

WHERE PEOPLE SLEEP
  • 1× Front queen bed with wardrobes both sides(Permanent)60×74
  • 1× Jack-knife sofa in the slide(Convertible)—
  • 1× Booth dinette in the slide(Convertible)—
HOW IT'S BUILT: 0/5
WallsWood frame + siding
FrameWood
RoofStandard
UnderbellyOpen

Gulf Stream (Caution tier): Gulf Stream Coach

YEAR BY YEAR: WHAT CHANGED
YEARSGVWRDRYMSRP
2019–2210,220 lb6,370 lb$50,313
2023–9,450 lb6,290 lb$50,313
  • 2019Introduced
  • 2023Supreme Series relaunch; dry weight cut to 6,290 lb
FINDING ONE

Common: usually several for sale within a day’s drive. Why: Gulf Stream is a volume manufacturer; 8-year production run; still in production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Couples plan: rear bath, front queen, outside half-kitchen - the lightest full-size Supreme.

OTHER TRAILMASTER FLOORPLANS
20QBG · 7,820 lb · sleeps 4262RLS · 8,270 lb · sleeps 626BHG · 7,930 lb · sleeps 10271DDS · 9,710 lb · sleeps 10275FBG · 7,690 lb · sleeps 10276BHS · 9,550 lb · sleeps 10278DDS · 9,730 lb · sleeps 10285DBS · 9,810 lb · sleeps 10288ISL · 8,480 lb · sleeps 10295SBW · 9,810 lb · sleeps 6299RLI · 9,740 lb · sleeps 6299SBW · 9,828 lb · sleeps 6301TB · 9,685 lb · sleeps 10302SBW · 10,360 lb · sleeps 6the whole line →
Find one for sale

Live listings for the 266RBS 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 Trailmaster line ↗

Is the 266RBS 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.