Fifth-wheel toy hauler · 2027 model year
2027 Grand Design Momentum 399M specs & floorplan
Explore the 2027 Grand Design Momentum 399M specification sheet: dimensions, weights, sleeping arrangements, tank capacities and available equipment.
Compare this to other models →Source checked 2026-10-23. View manufacturer specifications ↗
Manufacturer pricing
$216,567
Published MSRP · USD
Manufacturer-published MSRP; configuration basis is not specified. Freight, tax, title, license and dealer prep are excluded.
Price source checked · View manufacturer pricing.
This is a manufacturer reference price, not a dealer sale price or an out-the-door quote.
© Grand Design RV. Illustration may show optional equipment.
At a glance
- Exterior length
- 44′ 10″
- Unloaded weight
- 19,170 lb
- GVWR
- 23,500 lb
- Sleeps
- 5
Weight basis: Manufacturer unloaded vehicle weight.
Dealer pricing · USD
Dealer prices & price history
New units only. Prices are advertised offers from a small sample of dealers, not an exhaustive nationwide search or an out-the-door quote. Options and equipment vary by unit.
No recently verified advertised prices for this model. This does not mean no dealers have it in stock.
Listings are due for a new check every 48 hours. Initial collection and source failures can delay updates.
Advertised price history
Observations begin when tracking starts; earlier discounts are not reconstructed. History includes listings that may no longer be available.
Price history starts with our first observation. A trend will appear after more daily checks.
Dimensions & weights
- Exterior length
- 44′ 10″
- Garage length
- 12′ 6″
- Exterior width
- 8′ 5″
- Exterior height
- 13′ 6″
- Shipping / unloaded weight
- 19,170 lb
- GVWR
- 23,500 lb
- Listed cargo capacity
- Not verified
- Listed hitch weight
- 3,406 lb
Living & sleeping
- Sleeping capacity
- 5
- Slide-outs
- 3
- Main bed
- 60 X 80 Queen Bed (King Opt.)
- Bunk beds
- Not verified
- Dinette
- Not verified
- Bathroom
- Not verified
- Refrigerator
- 20 cu. ft. (power type not verified)
Tanks & everyday features
- Fresh water
- 140 gal
- Gray water
- 104 gal
- Black water
- 52 gal
- Awning length
- Not verified
- Shore power / electrical service
- Not verified
- Solar equipment
- Not verified
- Outdoor kitchen
- Not verified
- Washer/dryer prep
- Not verified
- Microwave
- Not verified
- Cooktop
- Not verified
- Air conditioning
- 30,000 BTU A/C
- Electric fireplace
- Not verified
- Backup camera
- Not verified
- Propane tanks
- 2
- Tire size
- ST215/75R17.5R LRH
Sources & specification notes
View manufacturer specifications ↗ · Checked .
“Not verified” means a confirmed value is unavailable. “Not listed” does not mean a feature is absent. Optional equipment is not confirmed as installed. Check the exact model year, configuration and unit labels with the manufacturer. This specification sheet does not establish towing compatibility.
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