01 What makes it unique
The 310GK is where the Solitude line starts, and the plan that opens the brand’s extended-stay luxury to the broadest range of trucks. At about 12,100 pounds dry it is the lightest coach in the line, yet it still carries the full Solitude build: the drop-frame 101-inch widebody chassis, a MORryde pin box, 8,000-pound axles, a walk-on TPO roof and the fully enclosed, heated underbelly. The layout is rear-kitchen, with a tri-fold hide-a-bed sofa, theater seating, a kitchen island and an outside kitchen for the campsite.
Its numbers make it the easiest Solitude to tow. RVUSA lists a published 19,000-pound GVWR against the 12,100-pound dry weight, which leaves an unusually large 6,900-pound payload — the most of any plan in the line — and a 2,350-pound dry pin, the lowest of the profiled plans. A single 30,000-BTU air-conditioning system, a 35,000-BTU furnace, a 20-cubic-foot 12-volt residential refrigerator and the standard 330-watt roof solar package come standard, with three slide-outs and two awnings.
At an MSRP of $141,620 it is the most accessible Solitude, and dealers discount it heavily — street prices well under the placard are common. For a couple who wants Grand Design’s flagship build and a rear kitchen without the length, weight or pin of the big full-timer plans, the 310GK is the line’s natural entry.
02 Full specifications
Dimensions
- Exterior length
- 34' 4"
- Exterior width
- 8' 5"
- Exterior height
- 13' 5"
- Interior height
- 8' 1"
Weights
- Dry / unit base weight
- 12,100 lbs
- GVWR (max loaded)
- 19,000 lbs
- Net cargo / payload
- 6,900 lbs
- Dry pin weight
- 2,350 lbs
Capacities
- Fresh water
- 81 gal
- Grey water
- 106 gal
- Black water
- 53 gal
- Refrigerator
- 20 cu ft
Construction
- Frame
- Drop-frame · 101" widebody
- Walls
- 5-side aluminum cage · laminated
- Roof
- Walk-on TPO · limited-lifetime warranty
- Underbelly
- Fully enclosed · heated tanks & storage
Running gear
- Axles
- 2 (8,000 lb tandem)
- Hitch
- Fifth-wheel (in-bed) · MORryde® pin box
- Suspension
- MORryde® CRE3000 · Tow Assist ABS
- Tires
- 17.5" H-rated Cooper
Galley & bath
- Cooktop
- Professional-grade SS · built-in oven
- Refrigerator
- 20 cu ft
- A/C
- 30,000 BTU (single high-capacity)
- Water heater
- On-demand · whole-house filtration
Sleeping & layout
- Sleeps
- 4
- Slides
- 3
- Awnings
- 2
- Primary bed
- King
03 The Solitude floorplan family
Solitude is Grand Design's flagship fifth wheel and one of the best-selling luxury extended-stay fifth wheels in North America. The line runs to ten floorplans for 2026; the eight highest-demand layouts are profiled here in full, and the remaining two are catalogued on the line hub. The 310GK on this page is highlighted; each other profiled plan links to its own page.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| 310GK | 34 ft | 4 | Light rear-kitchen entry, sub-13k dry |
| 370DV | 38 ft | 4 | Rear living, central island + prep bar |
| 380FL | 41 ft | 6 | Front living, bath-and-a-half, 5 slides |
| 382WB | 41 ft | 6 | Separate front living room, 5 slides |
| 376RD | 42 ft | 6 | Raised rear den, three sofas |
| 390RK | 42 ft | 6 | Rear kitchen, outdoor kitchen, 5 slides |
| 391DL | 42 ft | 8 | Two full baths, dual entry, sleeps 8 |
| 388MBS | 43 ft | 5 | Middle bunkroom, family, lower profile |
| 417KB | 42 ft | 4 | Rear kitchen, bath-and-a-half, master |
| 414LJMJ | 43 ft | 6 | Triple-axle flagship, mid bunk + loft |
Solitude is Grand Design's flagship extended-stay fifth wheel and one of the best-selling luxury fifth wheels in North America. The full line runs to ten floorplans for 2026; eight are profiled here and two more are catalogued above. Every plan rides on the same drop-frame 101-inch widebody chassis with a MORryde pin box, 8,000-pound axles and a fully enclosed heated underbelly, and ships with a 330-watt roof solar package, a 20-cubic-foot 12-volt refrigerator and an on-demand water heater with whole-house filtration as standard. Body specifications (lengths, heights, payload, tanks, sleeping, slides and awnings) are RVUSA-verified against the 2026 structured spec records, each page fp-slug and title checked; dry weight, GVWR, payload and pin weight are published per plan, and each plan's dry weight plus payload equals its GVWR exactly. Real loaded pin weights run higher — always weigh the loaded coach and confirm against your truck's payload and rear-axle ratings.
04 What owners & reviewers report
Lightest in the line
At about 12,100 lb dry it is the most tow-friendly Solitude — the widest truck compatibility in the luxury line.
Huge payload
A published 6,900-lb payload — by far the most of any profiled plan — leaves enormous margin for gear, water and full-timer supplies.
Full Solitude build at entry price
The same 101" widebody drop-frame chassis, MORryde pin box and heated underbelly as the big plans, at the line’s lowest MSRP.
Rear kitchen + outside kitchen
A rear-galley layout with a kitchen island, tri-fold sofa and an exterior cooking station — a campsite-friendly couples’ plan.
05 How it compares
The next size up — a rear-living plan with a central island and prep bar, a touch more length and weight.
Keystone’s rear-living luxury entry — the direct big-luxury-FW cross-shop against the Solitude line.
Grand Design’s own mid fifth wheel — lighter and cheaper, a half-ton-friendlier step below Solitude.