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Keystone Alpine 3712KB

Fifth wheelbuilt 2020– (in production)Mixed build tierCommon on the used market
WHAT ONE COSTS
$129,000MSRP today

Still in production. A used 2023 would run roughly $76,100.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~16,166 lbestimated as towed, for 2 people

dry weight 14,740 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 around17,965 lb (10% margin)
GVWR (the sticker maximum)16,500 lb
Tongue weight, loaded~3,477 lb (22%)
Cargo capacity3,260 lb
WHICH TOW VEHICLES IT FITS: 18 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 3712KB's published weights held steady. 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 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 77it doesn't fit

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

THE SPECS
Length41.4 ft
Height (incl. A/C)13.3 ft
Width8.3 ft
GVWR16,500 lb
Dry weight14,740 lb
Dry tongue weight3,170 lb
Cargo capacity3,260 lb
Sleeps6
Slide-outs5
Axles2
Fresh water75 gal
Grey water78 gal
Black water44 gal
Air conditioning15,000 BTU
Solar (standard)220 W

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

WHERE PEOPLE SLEEP
  • 1× rear private bedroom king bed(Permanent)70×80
  • 2× tri-fold sleeper sofa and dinette in front living room(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Keystone (Mixed tier): Keystone RV

YEAR BY YEAR: WHAT CHANGED
  • 2020Introduced
  • 2026Dual 18K Furrion Chill Cube A/C with heat pump and SolarFlex Protect 220 became standard
FINDING ONE

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

OUR TAKE

Front-living Alpine with walk-in pantry, XL shower and front windshield - the long-running flagship couples plan.

OTHER ALPINE FLOORPLANS
3011CK · 15,000 lb · sleeps 43020RE · 15,000 lb · sleeps 43100RE · 16,000 lb · sleeps 43102RL · 15,000 lb · sleeps 43120RS · 15,000 lb · sleeps 43220RL · 15,500 lb · sleeps 43303CK · 16,500 lb · sleeps 43320MK · 15,000 lb · sleeps 43400RS · 15,000 lb · sleeps 43450GK · 15,500 lb · sleeps 43450RL · 15,500 lb · sleeps 43500RE · 15,500 lb · sleeps 43500RL · 15,500 lb · sleeps 43640RL · 15,500 lb · sleeps 4the whole line →
Find one for sale

Live listings for the 3712KB 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 Alpine line ↗

Is the 3712KB 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.