01 What makes it unique
The 3420 is Brinkley’s rear-patio entertainer, a redesign of the popular 3400 built from owner feedback — the living area flipped to put the windows and seating on the camp side, an extra foot of length, and more storage. Its signature is a Zero-Gravity rear patio rated to 1,500 pounds, with solid flooring, full railing and a one-touch weather wall, plus a wet bar just inside with a 12-volt fridge that stays powered on the road, and a full outdoor kitchen with an outdoor TV and bar sink. Inside, a center-island kitchen with a 30-inch residential microwave, a 16-cubic-foot refrigerator and a large adjustable-shelf pantry serves a living room with a 64-inch tri-fold sofa (a 54-by-70-inch sleeper), theater seating, a televator and a fireplace. A dual-entry walk-through full bath separates it from a private front bedroom with a king bed slide-out and washer/dryer prep.
It is a heavier, longer plan that rides on 8,000-pound tandem axles. RVUSA lists a published 17,695-pound GVWR against a 14,794-pound dry weight, leaving a 2,901-pound payload and a 2,612-pound dry pin — figures that want a properly rated three-quarter-ton or one-ton truck. The full Brinkley build carries through on the monotube triple-powder-coated chassis, a CURT Touring Coil suspension with ABS, a Helux king pin and brass plumbing, with two air conditioners, a 370-watt solar package and the class-leading 79.5-inch bed and bath ceiling height standard.
At an MSRP of $136,263 it is one of the more expensive plans in the line, reflecting the rear-patio package. For a couple who entertains — indoors or out on a true three-season rear deck — and wants a king bedroom and a gourmet kitchen in Brinkley’s luxury build, the 3420 is the line’s social coach.
02 Full specifications
Dimensions
- Exterior length
- 39' 11"
- Exterior width
- 8' 0"
- Exterior height
- 13' 4"
- Bed & bath height
- 79.5" (class-leading)
Weights
- Dry / unit base weight
- 14,794 lbs
- GVWR (max loaded)
- 17,695 lbs
- Net cargo / payload
- 2,901 lbs
- Dry pin weight
- 2,612 lbs
Capacities
- Fresh water
- 75 gal
- Grey water
- 90 gal
- Black water
- 45 gal
- Refrigerator
- 16 cu ft
Construction
- Frame
- Monotube chassis · triple powder-coated
- Walls
- Laminated Azdel · high-gloss gel-coat fiberglass
- Insulation
- R40 roof · R11 walls · R40 floor
- Underbelly
- Enclosed & heated · forced-air circulated
Running gear
- Axles
- 2 (8,000 lb tandem) · 8,000 lb leaf springs
- Hitch
- Fifth-wheel (in-bed) · CURT Helux king pin
- Suspension
- CURT Touring Coil (TCS) · ABS w/ sway control
- Tires
- 17.5" Load Range H 16-ply · aluminum wheels
Galley & bath
- Cooktop
- Three-burner · 30" residential microwave
- Refrigerator
- 16 cu ft · 12-volt
- A/C
- 18k rear Furrion Chill Cube + 13.5k front w/ heat pump
- Water heater
- Tankless on-demand · 144 GPH
Sleeping & layout
- Sleeps
- Up to 7
- Slides
- 3
- Awnings
- 2
- Primary bed
- King (slide-out)
03 The Model Z floorplan family
The Brinkley Model Z is a mid-size luxury fifth wheel and one of the most talked-about new entrants in the segment. The line runs to twelve floorplans for 2026; the eight highest-demand layouts are profiled here in full, and the remaining four are catalogued on the line hub. The 3420 on this page is highlighted; each other profiled plan links to its own page.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| 2670 | 30 ft | 7 | Rear-living entry, lightest, outdoor kitchen |
| 2680 | 30 ft | 5 | Front bed + rear desk/office, remote-work |
| 2810 | 35 ft | 6 | Rear bunkhouse, L-bunks, private entry |
| 2900 | 33 ft | 5 | Rear living, center island, front master |
| 3100 | 35 ft | 7 | Rear living, center island, front bed |
| 3110 | 35 ft | 8 | Rear bunkhouse, center island, rear pass-through storage |
| 3300 | 37 ft | 6 | Rear kitchen, dual-entry bath, 150-gal fresh |
| 3400 | 39 ft | 7 | Rear kitchen + outdoor kitchen + rear patio |
| 3420 | 40 ft | 7 | Rear patio + outdoor kitchen, king bed (longer 3400) |
| 3515 | 40 ft | 7 | Rear office: pantry / laundry / mudroom / flex, king bed |
| 3600 | 39 ft | 7 | Rear-living variant, 72-inch tri-fold |
| 3610 | 42 ft | 10 | Flagship: mid bonus room, 3 A/C, sleeps 10 |
The Brinkley Model Z is a mid-size luxury fifth wheel built by Brinkley RV, an independent manufacturer founded by RV-industry veterans. The full line runs to twelve floorplans for 2026; eight are profiled here and four more are catalogued above. Every plan rides on the same monotube triple-powder-coated chassis with 7,000-pound tandem axles on 8,000-pound leaf springs, a CURT Touring Coil suspension with ABS and a Helux king pin, and a fully enclosed, heated underbelly, and ships with a 370-watt roof solar package (740-watt ready) with a 50-amp MPPT controller, a 16-cubic-foot 12-volt refrigerator, brass plumbing fittings and a tankless on-demand water heater as standard — with a class-leading 79.5-inch bed and bath ceiling height. 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
Zero-Gravity rear patio
A 1,500-lb rear deck with solid flooring, full railing, a one-touch weather wall and a powered wet bar — a true three-season outdoor room.
Outdoor kitchen + king bed
A full outdoor kitchen with TV and bar sink, plus a private front bedroom with a king bed slide-out — the entertainer’s layout.
8,000-lb axles
Heavier 8,000-pound tandem axles (not the 7,000-pound axles of the lighter plans) under a 17,695-lb GVWR — confirm a properly rated 3/4- or 1-ton truck.
Grey-tank figure
RVUSA lists a 90-gallon grey tank; some manufacturer press material for the prototype quoted 130 gallons. The published RVUSA structured figure is used here.
05 How it compares
The original rear-kitchen, rear-patio plan this redesigns — a foot shorter, with the windows on the off-door side.
The flagship — a four-slide, three-A/C coach with a flexible mid-coach bonus room if you need a whole extra room.
Grand Design’s rear-kitchen full-size luxury plan — a heavier, wider one-ton coach if you tow with a dually.