01 What makes it unique
The 417KB pairs a rear kitchen with the line’s full-timer comforts. A rear galley anchors the back of the coach, the main room carries a fireplace below an LED TV and a free-standing dinette with chairs, and the front holds a private master bedroom served by a bath-and-a-half — a second half bath that a couple living aboard or traveling with occasional guests values. Double tri-fold hide-a-bed sofas and theater seating fill out the living area.
The second bath shows in the tanks: a 106-gallon black tank serves the bath-and-a-half. RVUSA lists a published 19,000-pound GVWR against a 15,494-pound dry weight, leaving a 3,506-pound payload and the highest dry pin of the profiled plans at 3,290 pounds, reflecting the rear-kitchen mass over the rear axles. Four slide-outs, a 20-cubic-foot 12-volt refrigerator, 330-watt roof solar and a single 15,000-BTU air conditioner are standard.
At an MSRP of $149,194 it is one of the more accessible upper plans, and dealers discount it heavily — street prices well under the placard are common. For a couple who wants a rear kitchen, a fireplace, a free-standing dinette and a private master suite with a second bath, the 417KB is the rear-kitchen, bath-and-a-half Solitude.
02 Full specifications
Dimensions
- Exterior length
- 41' 8"
- Exterior width
- 8' 5"
- Exterior height
- 13' 5"
- Interior height
- 8' 1"
Weights
- Dry / unit base weight
- 15,494 lbs
- GVWR (max loaded)
- 19,000 lbs
- Net cargo / payload
- 3,506 lbs
- Dry pin weight
- 3,290 lbs
Capacities
- Fresh water
- 81 gal
- Grey water
- 106 gal
- Black water
- 106 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
- 15,000 BTU (single)
- Water heater
- On-demand · whole-house filtration
Sleeping & layout
- Sleeps
- 4
- Slides
- 4
- 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 417KB 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
Rear kitchen + bath-and-a-half
A rear galley with a private front master suite and a second half bath — a couple’s full-timer rear-kitchen plan.
Fireplace + free-standing dinette
A fireplace below an LED TV and a free-standing dinette with chairs — a residential main room.
Highest dry pin
At 3,290 lb the dry pin is the heaviest of the profiled plans — rear-kitchen mass over the rear axles; confirm truck payload.
Big black tank
A 106-gallon black tank serves the bath-and-a-half — sized for extended stays with the second bath.
05 How it compares
The other rear-kitchen plan — five slides and a bigger payload without the second half bath.
The two-full-bath plan — a full second bathroom and dual entry instead of a bath-and-a-half, sleeping eight.
Keystone’s rear-kitchen, bath-and-a-half plan — the direct big-luxury-FW cross-shop.