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Keystone Impact 311

Fifth wheelbuilt 2016–21Mixed build tierCommon on the used market
WHAT ONE COSTS
$56,100est. used (2021, 5 yr old)

Sticker was $82,971 in 2017. 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
~13,131 lbestimated as towed, for 2 people

dry weight 11,447 lb + fresh water (106 gal, full) 884 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 around14,590 lb (10% margin)
GVWR (the sticker maximum)16,450 lb
Tongue weight, loaded~2,810 lb (21%)
Cargo capacity5,003 lb
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 311'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
Length35.6 ft
Height (incl. A/C)13.1 ft
Width8.3 ft
GVWR16,450 lb
Dry weight11,447 lb
Dry tongue weight2,450 lb
Cargo capacity5,003 lb
Sleeps5
Slide-outs2
Axles2
Fresh water106 gal
Grey water88 gal
Black water44 gal
Air conditioning15,000 BTU

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

WHERE PEOPLE SLEEP
  • 1× Front queen bed(Permanent)—
  • 2× Garage bed over opposing sofas(Convertible)—
HOW IT'S BUILT: 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Keystone (Mixed tier): Impact / Fuzion Impact Edition

YEAR BY YEAR: WHAT CHANGED
YEARSGVWRDRYMSRP
201616,780 lb11,289 lb$82,971
2017–2116,450 lb11,447 lb$82,971
  • 2016Introduced
FINDING ONE

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

OUR TAKE

Shortest Impact fifth wheel; 10ft garage.

OTHER IMPACT FLOORPLANS
25V · 9,800 lb · sleeps 4260 · 11,250 lb · sleeps 626V · 9,770 lb · sleeps 42813 · 11,000 lb · sleeps 628V · 10,000 lb · sleeps 62915 · 11,300 lb · sleeps 629V · 10,000 lb · sleeps 6300 · 13,000 lb · sleeps 6301 · 13,000 lb · sleeps 6303 · 13,000 lb · sleeps 53118 · 12,500 lb · sleeps 4312 · 13,000 lb · sleeps 5317 · 13,000 lb · sleeps 53216 · 14,000 lb · sleeps 5the whole line →
Find one for sale

Live listings for the 311 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 Impact line ↗

Is the 311 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.