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KZ Spree 337RES

Travel trailerbuilt 2016–16Mixed build tierFindable on the used market
WHAT ONE COSTS
$21,600est. used (2016, 10 yr old)

Sticker was $40,514 in 2016. Out of production since 2016, so the used market is the only way to buy one. Estimate assumes a 2016 unit.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~9,500 lbestimated as towed, for 2 people

dry weight 8,410 lb + fresh water (40 gal, full) 334 lb + propane + battery 200 lb + gear for 2 600 lb (capped at its own rating). Brochure dry weight omits water, propane, batteries and your gear; this estimate doesn't.

You want a tow rating around10,560 lb (10% margin)
GVWR (the sticker maximum)9,500 lb
Tongue weight, loaded~1,152 lb (12%)
Cargo capacity1,090 lb
WHICH TOW VEHICLES IT FITS: 34 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 337RES's published weights held steady.

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
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-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
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 Tundra (i-Force Max, tow pkg) '22-2612,000 lbfits, loaded, with 10% margin
The 61it doesn't fit

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

THE SPECS
Length37.3 ft
Height (incl. A/C)11.5 ft
Width8.0 ft
Interior height6.8 ft
GVWR9,500 lb
Dry weight8,410 lb
Dry tongue weight1,020 lb
Cargo capacity1,090 lb
Sleeps6
Slide-outs3
Axles2
Fresh water40 gal
Grey water32 gal
Black water32 gal
Air conditioning13,500 BTU
Awning12 ft

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

WHERE PEOPLE SLEEP
  • 1× Front king bed(Permanent)70×80
  • 1× Theater seating(Convertible)—
  • 1× Dinette(Convertible)—
  • 1× Sofa(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

KZ (Mixed tier): KZ (Shipshewana, Indiana; a Thor Industries subsidiary) pitched Spree as its "luxury lightweight" travel trailer, and the build was genuinely a step above the budget tier — aluminum-framed laminated gelcoat fiberglass walls, a 3/8" walk-on roof and a heated, enclosed underbelly, all backed by KZ's 2-year hitch-to-bumper warranty. Unit-to-unit consistency was the weak spot, which is the usual KZ story, and the line was retired after 2018 when Connect and Escape took over the segment.

YEAR BY YEAR: WHAT CHANGED
  • 2016Introduced
  • 2017Renamed S323RE
FINDING ONE

Findable: a few listed nationwide most weeks. Why: KZ is a volume manufacturer; only one model year; 10 years out of production. Estimated from build volume and production span, not a count of live listings.

OUR TAKE

Rear-entertainment triple-slide with a king bed; 17' second awning optional. Became the S323RE for 2017.

OTHER SPREE FLOORPLANS
230RBS · 6,000 lb · sleeps 3231BHS · 6,000 lb · sleeps 6240BHS · 6,500 lb · sleeps 8262RKS · 6,800 lb · sleeps 4263RKS · 6,800 lb · sleeps 3280RLS · 7,000 lb · sleeps 4300RLS · 8,300 lb · sleeps 4304RL · 8,800 lb · sleeps 6320BS · 9,300 lb · sleeps 6321RKS · 8,300 lb · sleeps 5322BHS · 8,300 lb · sleeps 10324BHS · 7,950 lb · sleeps 10328IK · 9,500 lb · sleeps 6329IK · 9,500 lb · sleeps 10the whole line →
Find one for sale

Live listings for the 337RES 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 Spree line ↗

Is the 337RES 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 manufacturer spec sheets, retrieved 2026-07.