CamperHardlyKnowHer

KZ Sportster 300THR

Travel trailerbuilt 2018–18Mixed build tierFindable on the used market
WHAT ONE COSTS
—price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~8,316 lbestimated as towed, for 2 people

dry weight 6,890 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 around9,240 lb (10% margin)
GVWR (the sticker maximum)10,000 lb
Tongue weight, loaded~1,400 lb (17% — high, eats payload)
Cargo capacity3,110 lb
WHICH TOW VEHICLES IT FITS — 42 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 300THR'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 Expedition (3.5 EcoBoost, tow pkg) '18-249,300 lbfits, loaded, with 10% margin
Ford Expedition (3.5 EcoBoost, tow pkg) '25-269,600 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) '11-1411,300 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 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) '20-2237,000 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) '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
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
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 53it doesn't fit
  • Chevrolet Colorado / GMC Canyon (2.7 Turbo HO, tow pkg) '23-26 — over by ~1,386 lb loaded
  • Chevrolet Colorado / GMC Canyon (2.8 Duramax) '15-22 — over by ~1,386 lb loaded
  • Chevrolet Suburban (5.3 V8, max tow) '21-26 — over by ~846 lb loaded
  • Chevrolet Tahoe (5.3 V8, max tow) '21-26 — over by ~756 lb loaded
  • Chevrolet Traverse (tow pkg) '18-26 — over by ~3,816 lb loaded
  • Chrysler Pacifica '17-26 — over by ~5,076 lb loaded
  • Dodge Durango (5.7 / 6.4 Hemi, tow pkg) '14-26 — over by ~486 lb loaded
  • Ford Bronco 4-dr (2.7 EcoBoost, tow pkg) '21-26 — over by ~4,266 lb loaded
  • Ford Explorer (3.0 EcoBoost, tow pkg) '20-26 — over by ~3,276 lb loaded
  • Ford Maverick (2.0 EcoBoost, 4K tow pkg) '22-26 — over by ~4,716 lb loaded
  • Ford Ranger (2.3 EcoBoost, tow pkg) '19-23 — over by ~1,566 lb loaded
  • Ford Ranger (2.7 EcoBoost, tow pkg) '24-26 — over by ~1,566 lb loaded
  • Ford Transit (HD tow pkg) '15-26 — over by ~2,106 lb loaded
  • GMC Acadia (tow pkg) '20-26 — over by ~3,816 lb loaded
  • GMC Hummer EV Pickup '22-26 — over by ~1,566 lb loaded
  • GMC Yukon / Yukon XL (5.3 V8, max tow) '21-26 — over by ~756 lb loaded
  • Honda Odyssey '18-26 — over by ~5,166 lb loaded
  • Honda Passport (AWD) '19-26 — over by ~3,816 lb loaded
  • Honda Pilot (AWD, tow pkg) '16-26 — over by ~3,816 lb loaded
  • Honda Ridgeline (AWD) '17-26 — over by ~3,816 lb loaded
  • Hyundai Palisade (tow pkg) '20-26 — over by ~3,816 lb loaded
  • Hyundai Santa Cruz (2.5T AWD) '22-26 — over by ~3,816 lb loaded
  • Jeep Gladiator (3.6 V6, max tow) '20-26 — over by ~1,386 lb loaded
  • Jeep Grand Cherokee (5.7 Hemi) '11-21 — over by ~1,836 lb loaded
  • Jeep Grand Cherokee (WL, tow pkg) '22-26 — over by ~2,736 lb loaded
  • Jeep Grand Cherokee L (5.7 Hemi) '21-26 — over by ~1,836 lb loaded
  • Jeep Wrangler Unlimited 4-dr (tow pkg) '18-26 — over by ~5,166 lb loaded
  • Kia Telluride (tow pkg) '20-26 — over by ~3,366 lb loaded
  • Land Rover Defender '20-26 — over by ~936 lb loaded
  • Land Rover Discovery '17-26 — over by ~936 lb loaded
  • Lexus GX 550 (tow pkg) '24-26 — over by ~131 lb loaded
  • Lexus LX 600 '22-26 — over by ~1,116 lb loaded
  • Mazda CX-90 (3.3 turbo, tow pkg) '24-26 — over by ~3,816 lb loaded
  • Mercedes-Benz Sprinter '19-26 — over by ~1,566 lb loaded
  • Nissan Armada (3.5 twin-turbo, tow pkg) '25-26 — over by ~666 lb loaded
  • Nissan Armada (tow pkg) '17-24 — over by ~666 lb loaded
  • Nissan Frontier (3.8 V6, tow pkg) '22-26 — over by ~1,881 lb loaded
  • Nissan Pathfinder (tow pkg) '22-26 — over by ~2,916 lb loaded
  • Ram ProMaster '14-26 — over by ~2,096 lb loaded
  • Rivian R1S '22-26 — over by ~1,386 lb loaded
  • Subaru Ascent '19-26 — over by ~3,816 lb loaded
  • Subaru Outback (XT / Wilderness) '20-26 — over by ~5,166 lb loaded
  • Tesla Model X (tow pkg) '16-26 — over by ~3,816 lb loaded
  • Tesla Model Y (tow pkg) '21-26 — over by ~5,166 lb loaded
  • Toyota 4Runner (4.0 V6) '11-24 — over by ~3,816 lb loaded
  • Toyota 4Runner (i-Force Max) '25-26 — over by ~2,916 lb loaded
  • Toyota Grand Highlander (i-Force Max) '24-26 — over by ~3,816 lb loaded
  • Toyota Highlander (tow pkg) '20-26 — over by ~3,816 lb loaded
  • Toyota Land Cruiser (i-Force Max) '24-26 — over by ~2,916 lb loaded
  • Toyota Sienna '21-26 — over by ~5,166 lb loaded
  • Toyota Tacoma (i-Force Max, tow pkg) '24-26 — over by ~2,466 lb loaded
  • Toyota Tacoma (V6, tow pkg) '16-23 — over by ~2,196 lb loaded
  • Volkswagen Atlas (tow pkg) '18-26 — over by ~3,816 lb loaded
THE SPECS
Length33.2 ft
Height (incl. A/C)12.3 ft
Width8.5 ft
Interior height7.5 ft
GVWR10,000 lb
Dry weight6,890 lb
Dry tongue weight1,160 lb
Cargo capacity3,110 lb
Sleeps6
Slide-outs0
Axles2
Fresh water75 gal
Grey water32 gal
Black water32 gal
Air conditioning13,500 BTU
Awning18 ft

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

WHERE PEOPLE SLEEP
  • 1× Front queen bed(Permanent)—
  • 2× 72" roll-over sofas in the garage(Convertible)—
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

KZ (Mixed tier): KZ's toy hauler line (Thor Industries), sold as Sportsmen Sportster through 2016, Sportster/Sportster 100 from 2017, and Sportster X since 2025. Construction is mid-pack for the segment — aluminum-framed laminated fiberglass walls, a 3/8" walk-on roof and a heated, enclosed underbelly — with a Tuff Ply garage floor and diamond-plate wall protection that hold up well. KZ's assembly quality is uneven unit to unit, which is why it lands in the middle rather than at the top.

YEAR BY YEAR — WHAT CHANGED
  • 2018Introduced
  • 2019Replaced by the 290THR
FINDING ONE

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

THE READ

No-slide 33-footer with 15'11" of cargo area — the widest-body Sportster's first year at 102".

OTHER SPORTSTER FLOORPLANS
18TH · 7,000 lb · sleeps 4190TH · 7,000 lb · sleeps 4210TH · 7,000 lb · sleeps 6211THD · 7,940 lb · sleeps 6220THR · 7,000 lb · sleeps 6229TH · 7,000 lb · sleeps 422X · 12,000 lb · sleeps 626X · 12,750 lb · sleeps 6270TH · 8,800 lb · sleeps 6270THR · 10,000 lb · sleeps 4280THR · 8,800 lb · sleeps 6290THR · 10,000 lb · sleeps 8301THR · 11,000 lb · sleeps 830TH12 · 10,000 lb · sleeps 6the whole line →
Is the 300THR 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 and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

Data compiled from manufacturer spec sheets, retrieved 2026-07.