01 What makes it unique
The 375RD is the plan that gives the line its name: an ‘RD’ rear den at the back of the coach, configurable as an office, a second lounge or a guest space, ahead of a mid living area and a front king suite. It opens on five slide-outs — the most in the line alongside the 385FL — and sleeps five. The equipment is the full Paradigm package: a Lusso range with a 12,000-BTU burner and a 3.73-cubic-foot oven, a 19-cubic-foot 12-volt residential refrigerator, a king bed and a fireplace, on the Benchmark 101-inch wide-body drop-frame chassis with Curt 8,000-pound axles, self-adjusting brakes and six-point hydraulic leveling.
Alliance publishes an 18,000-pound GVWR against the 14,771-pound dry weight, leaving a 3,229-pound cargo capacity and a 2,875-pound dry pin, on the Curt 8,000-pound axles. Three roof air conditioners totalling 40,500 BTU, a 40,000-BTU furnace, a 12-gallon gas/electric water heater, an enclosed and heated underbelly and 98/106/53-gallon fresh/grey/black tanks are standard. At a starting MSRP around $132,000, with street pricing below placard, the 375RD is the flexible-space Paradigm — the rear-den layout for buyers who want a dedicated office or second living zone and tow with a one-ton truck.
02 Full specifications
Dimensions
- Exterior length
- 41' 9"
- Exterior width
- 101" (wide-body chassis)
- Exterior height
- 13' 5"
- Chassis
- Benchmark 101" wide-body drop-frame
Weights
- Dry / unit base weight (UVW)
- 14,771 lbs
- GVWR (max loaded)
- 18,000 lbs
- Net cargo / payload (CCC)
- 3,229 lbs
- Dry pin (hitch) weight
- 2,875 lbs
Capacities
- Fresh water
- 98 gal
- Grey water
- 106 gal
- Black water
- 53 gal
- Refrigerator
- 19 cu ft
Construction
- Chassis
- Benchmark 101" wide-body drop-frame
- Suspension
- TCS Touring Coil Suspension · MorRyde 8K independent disc available
- Walls
- Azdel-backed high-gloss fiberglass · insulated laminated rear wall
- Roof
- Walkable PVC membrane · roof ladder · access ports
- Underbelly
- Enclosed & heated tanks · heated low-point drains
Running gear
- Axles
- 2 (Curt 8,000 lb)
- Hitch
- Fifth-wheel (in-bed) · Helux coil-spring pin box · 2" accessory receiver
- Brakes
- Self-adjusting · MorRyde 8K independent disc option
- Tires
- H-rated · Counteract balancing beads · 16" spare
Galley & bath
- Cooktop
- Lusso range · 12,000-BTU burner · 3.73 cu ft oven
- Refrigerator
- 19 cu ft
- A/C
- 3 units · 40,500 BTU of forced air
- Water heater
- 12-gal gas / electric
Sleeping & layout
- Sleeps
- 5
- Slides
- 5
- Entries
- 1
- Awnings
- 2
- Primary bed
- King
03 The Paradigm floorplan family
Paradigm is Alliance RV's luxury full-profile fifth wheel — the company's flagship since 2019 and a cross-shop against Grand Design's Solitude, Keystone's Montana and Jayco's Pinnacle. The 2026 line runs to ten floorplans; the six profiled in full are linked below and the four catalogued plans are shown muted. The 375RD on this page is highlighted.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| 295MK | 33 ft | 4 | Mid kitchen, rear living, shortest in line |
| 310RL | 34 ft | 4 | Rear living great room, walk-around island |
| 312RK | 34 ft | 4 | Rear kitchen |
| 340RL | 37 ft | 4 | Rear living |
| 370FB | 40 ft | 4 | Front bath |
| 388SP | 40 ft | 4 | Side patio, new for 2026, flagship |
| 385FL | 41 ft | 6 | Front living, loft, sleeps six |
| 382RK | 41 ft | 6 | Rear kitchen, sleeps six |
| 375RD | 41 ft | 5 | Rear den, five slides (namesake plan) |
| 395DS | 42 ft | 7 | Sleeps 7 (largest catalogued) |
Paradigm has been Alliance RV's luxury full-profile fifth wheel and its flagship since the company's founding in 2019. The 2026 line runs to ten floorplans; the six broadest-appeal layouts are profiled here in full and the remaining four are catalogued from published specifications below. Every Paradigm rides the Benchmark 101-inch wide-body drop-frame chassis on Curt 8,000-pound axles with self-adjusting brakes, H-rated tires and a Helux coil-spring pin box, with six-point hydraulic leveling, an enclosed and heated underbelly, a walkable PVC roof, a 19-cubic-foot 12-volt residential refrigerator, three roof air conditioners totalling 40,500 BTU, a 40,000-BTU furnace, a 12-gallon gas/electric water heater and a Lusso range as standard; a MorRyde 8K independent suspension with disc brakes is available. Hitch weight, GVWR, dry weight and CCC are published per plan and each plan's dry weight plus CCC equals its GVWR exactly. Dry weight is a factory estimate; 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 den (the namesake)
An ‘RD’ rear den configurable as an office, second lounge or guest space — the layout the line is named for.
Five slide-outs
Opens on five slides — the most in the line with the 385FL — for a wide-open main level.
Front king suite + mid living
A front king suite ahead of a mid living area, sleeping five with the full Paradigm equipment list.
Wants a one-ton truck
At nearly 42 feet on an 18,000-pound GVWR, confirm a properly rated one-ton truck’s payload and rear-axle rating.
05 How it compares
Grand Design’s big-body luxury Solitude — a full-profile luxury-5W cross-shop in the same length class.
Jayco’s luxury Pinnacle — a full-profile luxury fifth wheel in the same tier.
The rear-living 310RL — shorter, lighter and a rear great room instead of a rear den.