01 What makes it unique
The Momentum G-Class 363G is a fifth-wheel toy hauler 41 ft 7 in long with a 13 ft* garage, on two axles with two slide-outs and a 30-gallon fuel station. It is on Grand Design’s Momentum G-Class roster for 2027.
Grand Design’s page lists an unloaded vehicle weight of 14,250 lb, a GVWR of 19,000 lb and a pin weight of 3,100 lb. It publishes no cargo carrying capacity, so none is printed or computed here. Tanks are 98 gal fresh, 102 gal grey and 52 gal black, and it sleeps 9.
Grand Design’s page names the 394G and 350G as comparison floorplans.
How the 363G differs from the other eleven Momentum fifth wheels. Most distinctive first. Each rank counts only the siblings that publish that field, and a figure most of them share is left out.
- Pin weight as a share of dry weight, 21.8%: second-largest of twelve, between the 394G (21.3%) and the 344M (22%).
- Dry weight, 14,250 lb: fourth-lightest of twelve, between the 350G (13,400 lb) and the 351MS (15,760 lb).
- Pin weight, 3,100 lb: fifth-lightest of twelve, between the 351MS (3,000 lb) and the 399M (3,406 lb).
- Sleeping capacity, 9: largest of twelve, level with the 392M; next are the 394G, 395MT and 396DB (7).
- Slide-out count, 2: fewest of twelve, level with the 325G; next are the 320G, 344M and eight others (3).
- Length, 41 ft 7 in: sixth-shortest of twelve, between the 344M and 351MS (39 ft 11 in) and the 381MS (43 ft 11 in).
- Grey tank, 102 gal: sixth-smallest of twelve, between the 395MT (78 gal) and the 325G, 344M and four others (104 gal).
- Fresh tank, 98 gal: smallest of twelve, level with the 320G, 350G and 394G; next are the 325G, 344M and six others (140 gal).
- GVWR, 19,000 lb: shared with the 344M and 351MS; of twelve, three lower and six higher, nearest the 325G and 350G (18,000 lb) and the 394G (22,500 lb).
Next to the 350G, the nearest lighter floorplan by dry weight, the 363G is 850 lb heavier by dry weight, has a GVWR 1,000 lb higher, has a pin weight 500 lb heavier, is 1 ft 10 in longer, has a grey tank 50 gal larger, has a black tank 52 gal smaller, sleeps four more and has one fewer slide-out; the two publish the same exterior height and fresh tank.
Next to the 351MS, the nearest heavier floorplan by dry weight, the 363G is 1,510 lb lighter by dry weight, has a pin weight 100 lb heavier, is 1 ft 8 in longer, has a fresh tank 42 gal smaller, has a grey tank 50 gal larger, has a black tank 52 gal smaller, sleeps three more and has one fewer slide-out; the two publish the same GVWR and exterior height.
02 Full specifications
Dimensions
- Exterior length
- 41 ft 7 in
- Exterior width
- 8 ft 5 in
- Exterior height
- 13 ft 6 in
- Garage / flex length
- 13 ft*
Weights
- Dry / unit base weight (UVW)
- 14,250 lbs
- GVWR (max loaded)
- 19,000 lbs
- Net cargo / payload
- Not published by Grand Design
- Hitch / pin weight
- 3,100 lbs
Capacities
- Fresh water
- 98 gal
- Grey water
- 102 gal
- Black water
- 52 gal
- LP gas
- 60 lbs · 2 tanks
- Refrigerator
- 15 cu. ft.
Construction
- Chassis
- 101″ Wide-Body Super Chassis · new Omega Frame
- Sidewalls
- Laminated aluminum framed (R-11)
- Roof
- 5″ radius wood framed (R-40*) · Worry-Free composite, lifetime warranty
- Ramp door
- Laminated aluminum framed (R-7)
- Slide rooms
- Laminated aluminum framed roof and end walls (R-7)
Running gear
- Hitch
- Fifth-wheel (in-bed) · Rotoflex pin box
- Suspension
- MORryde CRE3000 · upgraded axle hangers
- Leveling
- Electric auto-leveling
- Tires
- Heavy-duty H-rated · 17.5″ H-rated aluminum wheels
- Spare
- Full-sized spare tire and carrier
- Tire size
- ST215/75R17.5 LRH
- GAWR, as Grand Design lists it
- 16,000 lbs
Garage
- Garage / flex length
- 13 ft*
- Ramp
- Laminated aluminum framed rear ramp door (R-7)
- Tie-downs
- 2,500 lb tie-downs anchored into the chassis
- Fuel station
- 30 gal
Galley & systems
- Refrigerator
- 15 cu. ft. 12-volt
- Air conditioning
- 15,000 BTU
- Furnace
- 35,000 BTU
- Water heater
- Tankless
- Solar
- Standard solar package · 39 AMP charge controller · panel wattage not asserted*
- Shower
- 48 X 30''
Sleeping & layout
- Sleeps
- 9
- Slides
- 2
- Awnings
- 3
- Hitch type
- Fifth-wheel (in-bed)
- Primary bed
- 60 X 80 Queen Bed (King Opt.)
How these published figures sit against the rest of the catalogue: fifth wheel pin weight and payload; fresh, grey and black tank sizes; camper trailer size chart.
Drawn to scale
Size, with end view
Holding tanks
Axles, wheels and nose shape are schematic; not a floorplan. Data: dataset.
Towing it
Check your vehicle. Enter the ratings from your owner’s manual and the door-pillar placard.
Compares your figures with this page’s published GVWR (19,000 lb) and the upper loaded pin estimate (4,750 lb, a rule of thumb). Your vehicle’s placard and the trailer’s own weight label govern.
Loaded range: 15–25% of GVWR on the pin, a rule of thumb, not a measurement of this unit. No truck ratings or hitch classes (why; NHTSA, DOT HS 809 433). The range starts at the published figure, because loaded is never lighter than that.
03 The Momentum floorplan family
Momentum is Grand Design's toy-hauler family, and it spans four rosters across both tow types. The full-size Momentum fifth wheel is the flagship — a 101-inch wide-body coach on MORryde independent suspension with disc brakes, carrying a 60-gallon dual fuel station. The Momentum G-Class fifth wheel sits below it on MORryde CRE3000 suspension and a Rotoflex pin box with a 30-gallon fuel station, and the G-Class travel trailer puts that same garage behind a bumper pull. The Momentum MAV is the compact end — the lightest and cheapest way into a Momentum garage, and the one roster with no fuel station at all. The 363G on this page is highlighted; each other profiled plan links to its own page. The full MY2027 catalogue runs to 28 floorplans across the four rosters; eight are profiled in depth here and the rest are catalogued on the line hub with their weights.
| Floorplan | Roster | Type | Length | Garage | Sleeps | Notable |
|---|---|---|---|---|---|---|
| 325G | Momentum G-Class | 5W | 35′ 6″ | 15 ft | 6 | 15 ft garage, sleeps 6, 2 slides |
| 320G | Momentum G-Class | 5W | 36′ 3″ | 11 ft | 6 | Entry G-Class fifth wheel — lowest GVWR of the six |
| 350G | Momentum G-Class | 5W | 39′ 9″ | 14 ft 6 in | 5 | 14 ft 6 in garage, sleeps 5, 3 slides |
| 363G | Momentum G-Class | 5W | 41′ 7″ | 13 ft* | 9 | 13 ft* garage, sleeps 9, 2 slides |
| 394G | Momentum G-Class | 5W | 44′ 11″ | 15 ft* | 7 | Top G-Class GVWR, biggest G-Class payload, triple awning |
The Momentum G-Class fifth wheel sits below the full-size Momentum — the same 101-inch wide-body idea on MORryde CRE3000 suspension and a Rotoflex pin box, with a 30-gallon fuel station and prices roughly forty thousand dollars under the flagship. Pin weights are factory dry figures and climb with cargo. Additional G-Class fifth-wheel floorplans are catalogued on the line hub.
04 Notes on this floorplan
13 ft* garage, 30-gallon fuel station
Garage / flex length and fuel station as printed on the 363G page.
Pin 3,100 lb on 14,250 lb UVW
Grand Design’s pin weight is 21.8% of its unloaded weight; the loaded figure is higher.
15,000 BTU A/C, 35,000 BTU furnace
Climate equipment as Grand Design lists it for the 363G.
98 fresh / 102 grey / 52 black
Tank capacities in gallons, from the 363G page.
05 How it compares
Named by Grand Design’s 363G page as a comparison floorplan: UVW 16,400 lb, GVWR 22,500 lb, 44 ft 11 in.
Named by Grand Design’s 363G page as a comparison floorplan: UVW 13,400 lb, GVWR 18,000 lb, 39 ft 9 in.
Every current Momentum floorplan, all four rosters, side by side.
07 Where this floorplan sits
Closest sibling: the Momentum 394G, nearest on the published figures. It differs on 6 of the 8 fields both publish (this plan first): length 41 ft 7 in vs 44 ft 11 in; sleeps 9 vs 7; dry weight 14,250 lb vs 16,400 lb; GVWR 19,000 lb vs 22,500 lb; hitch weight 3,100 lb vs 3,500 lb; grey tank 102 gal vs 104 gal. They match on fresh tank and black tank.
| Momentum fifth-wheel plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 19,000 | 4–6 of 12 | 16,400–23,500 |
| Dry weight (lb) | 14,250 | 4 of 12 | 12,603–19,170 |
| Hitch weight (lb) | 3,100 | 5 of 12 | 2,300–3,760 |
| Length | 41 ft 7 in | 6 of 12 | 35 ft 6 in–46 ft 4 in |
| Fresh tank (gal) | 98 | 1–4 of 12 | 98–140 |
| Grey tank (gal) | 102 | 6 of 12 | 52–104 |
| Black tank (gal) | 52 | 1–7 of 12 | 52–104 |
| Sleeps | 9 | 11–12 of 12 | 5–9 |
Either side of it by GVWR: Momentum 351MS matches it at 19,000 lb GVWR; Momentum 394G is 3,500 lb heavier (22,500 lb GVWR).
| Nearest Momentum fifth-wheel siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Momentum 363G | 41 ft 7 in | 9 | 14,250 | 19,000 | — | 3,100 | 98 |
| Momentum 394G | 44 ft 11 in | 7 | 16,400 | 22,500 | 6,100 | 3,500 | 98 |
| Momentum 344M | 39 ft 11 in | 6 | 15,910 | 19,000 | 3,090 | 3,500 | 140 |
| Momentum 392M | 45 ft 11 in | 9 | 18,114 | 23,500 | 5,386 | 3,650 | 140 |
| Momentum 325G | 35 ft 6 in | 6 | 12,603 | 18,000 | — | 2,638 | 140 |
| Momentum 396DB | 46 ft 4 in | 7 | 19,100 | 23,500 | — | 3,760 | 140 |
All 24 Momentum floorplans: Momentum line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| 363G | 19,000 | 14,250 | 9 | 41 ft 7 in |
| Influence 3804DS | 19,000 | 14,603 | 6 | 42 ft 6 in |
| North Point 375TBDB | 19,000 | 15,735 | 9 | 42 ft 1 in |
| Paradigm 385FL | 19,000 | 15,487 | 6 | 41 ft 4 in |
| Solitude 310GK | 19,000 | 12,100 | 4 | 34 ft 4 in |
| Seismic 3512 | 18,995 | 14,285 | 7 | 41 ft 7 in |
| Riverstone 39RKFB | 18,975 | 16,511 | 4 | 42 ft 1 in |
Against the 363G: the Influence 3804DS sleeps 3 fewer; the Paradigm 385FL sleeps 3 fewer.
08 Common questions about the 363G
How much does the 363G weigh?
14,250 lb dry; 19,000 lb GVWR, the most it may weigh loaded.
What is the pin weight of the 363G?
3,100 lb as published, 22% of the dry weight (median across 411 fifth wheels here: 19%).
What size tow vehicle does the 363G need?
A tow rating of at least 19,000 lb, plus payload for the loaded pin weight, passengers and cargo.
How many people does the 363G sleep?
It is rated to sleep 9. No other Momentum fifth-wheel floorplan here is rated for more.
What are the tank capacities on the 363G?
Fresh 98, grey 102, black 52 gallons. Off hookups, fresh water runs out first.
How long is the 363G?
41 ft 7 in overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
14 of the 18 fields this catalogue tracks are published for the 363G. Not published: cargo capacity (CCC), interior height, axle count, tire size (a description is published, a size is not).
Sourcing rules: methodology.
10 Manuals & documents
Sources: granddesignrv.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 19 recall campaigns and 201 owner complaints (model years 2005 on) against the Momentum line. They are counted separately: a recall is a confirmed defect with a remedy, a complaint one owner’s unverified account.
What to look at on a used one. Across the 201 complaints filed on this line the most-reported components are structure (41%), unknown or other (19%) and suspension (10%).
Recall coverage here is not complete, and complaints are owners’ unverified reports (how this record is built). Check a specific VIN at NHTSA before you buy. Full tables are on the Momentum line page.