01 What makes it unique
Coachmen lists the 2025 Chaparral 373MBRB at 13,031 lb dry, a GVWR of 15,000 lb, a net carrying capacity of 1,969 lb and a pin weight of 2,219 lb. Its dry weight plus its carrying capacity comes to exactly its GVWR.
It is 42' 6" long and 13' high. Coachmen prints its tanks as 48 gal fresh, 120 gal grey, 75 gal black.
Among the 19 Chaparral floorplans Coachmen’s 2025 fifth-wheel brochure lists with a published dry weight, it is number 18 from the lightest, in a range from 6,950 lb (Chaparral Lite 235RK) to 13,080 lb (Chaparral 393MBX). Every figure in that comparison is Coachmen’s, for the same model year.
Every number on this page was read on 5 Nov 2026 from Coachmen’s 2025 fifth-wheel brochure, the maker’s own dated document for model year 2025.
How the 373MBRB differs from the other eighteen Chaparral floorplans. Most distinctive first. How these ranks are worked out.
- Dry weight, 13,031 lb: second-heaviest of nineteen, between the 389DEK (12,721 lb) and the 393MBX (13,080 lb).
- Cargo capacity as a share of GVWR, 13.1%: second-smallest of eighteen, between the 389DEK (12.3%) and the 375BAF (14.3%).
- Grey tank, 120 gal: third-largest of nineteen, between the 367BH, 375BAF and 381DBL (112 gal) and the 355FBX and 389DEK (135 gal).
- Cargo capacity, 1,969 lb: fourth-smallest of nineteen, between the 30BHS (1,965 lb) and the 30RLS (2,019 lb).
- Pin weight, 2,219 lb: fourth-heaviest of nineteen, between the 367BH (2,194 lb) and the 389DEK (2,320 lb).
- Black tank, 75 gal: shared with the 381DBL; of nineteen, sixteen smaller and one larger, nearest the 367BH and 375BAF (72 gal) and the 355FBX (90 gal).
- GVWR, 15,000 lb: shared with the 334FL; of nineteen, fifteen lower and two higher, nearest the 355FBX, 375BAF and two others (14,500 lb) and the 367BH and 393MBX (15,500 lb).
- Pin weight as a share of dry weight, 17%: seventh-smallest of nineteen, between the 381DBL (16.7%) and the 235RK (17.2%).
- Length, 42 ft 6 in: shared with the 334FL, 367BH and three others; of nineteen, twelve shorter and one longer, nearest the 389DEK (42 ft 4 in) and the 355FBX (42 ft 7 in).
- Exterior height, 13 ft: tallest of nineteen, level with the 334FL, 355FBX and five others; next are the 298RLS, 336TSIK and 360IBL (12 ft 10 in).
Next to the 389DEK, the nearest lighter floorplan by dry weight, the 373MBRB is 310 lb heavier by dry weight, has a GVWR 500 lb higher, has 190 lb more cargo capacity, has a pin weight 101 lb lighter, is 2 in longer, has a grey tank 15 gal smaller and has a black tank 30 gal larger; the two publish the same exterior height and fresh tank.
Next to the 393MBX, the nearest heavier floorplan by dry weight, the 373MBRB is 49 lb lighter by dry weight, has a GVWR 500 lb lower, has 451 lb less cargo capacity, has a pin weight 279 lb lighter, has a grey tank 35 gal larger and has a black tank 30 gal larger; the two publish the same length, exterior height and fresh tank.
02 Full specifications
Dimensions
- Exterior length
- 42' 6"
- Exterior height
- 13'
- Exterior width
- Not published by Coachmen
- Interior height
- Printed in the brochure, not transcribed here
Weights
- Dry / unit base weight (UVW)
- 13,031 lb
- GVWR (max loaded)
- 15,000 lb
- Net cargo / payload (CCC)
- 1,969 lb
- Hitch / pin weight
- 2,219 lb
Capacities
- Fresh water
- 48 gal
- Grey water
- 120 gal
- Black water
- 75 gal
Running gear
- Hitch type
- Fifth wheel (pin box)
- Tire size
- 16" G
Sleeping & layout
- Sleeps
- Not published by Coachmen
- Awning
- 17'
- Wheel size
- 16"
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
Weight budget
Size (no width published)
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 (15,000 lb) and the upper loaded pin estimate (3,750 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).
03 The Chaparral floorplan family
Coachmen’s 2025 fifth-wheel brochure lists 19 Chaparral floorplans; every one with a printed weight has a page here.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| Chaparral Lite 235RK | 27' 3\" | — | Profiled |
| Chaparral Lite 25RE | 29' 10\" | — | Profiled |
| Chaparral Lite 254RLS | 30' 9\" | — | Profiled |
| Chaparral Lite 274BH | 35' 11\" | — | Profiled |
| Chaparral Lite 284RL | 34' 2\" | — | Profiled |
| Chaparral Lite 30RLS | 34' 2\" | — | Profiled |
| Chaparral Lite 30BHS | 37' | — | Profiled |
| Chaparral 298RLS | 34' 8\" | — | Profiled |
| Chaparral Lite 368TBH | 42' | — | Profiled |
| Chaparral 336TSIK | 37' | — | Profiled |
| Chaparral 360IBL | 39' 9\" | — | Profiled |
| Chaparral 355FBX | 42' 7\" | — | Profiled |
| Chaparral 381DBL | 42' 6\" | — | Profiled |
| Chaparral 367BH | 42' 6\" | — | Profiled |
| Chaparral 334FL | 42' 6\" | — | Profiled |
| Chaparral 375BAF | 42' 6\" | — | Profiled |
| Chaparral 389DEK | 42' 4\" | — | Profiled |
| Chaparral 373MBRB | 42' 6\" | — | Profiled |
| Chaparral 393MBX | 42' 6\" | — | Profiled |
Coachmen’s 2025 fifth-wheel brochure lists 19 Chaparral floorplans. Every one with a printed weight has a page here.
04 Notes on this floorplan
What Coachmen does not publish for the Chaparral 373MBRB
Coachmen prints no sleeping capacity for this model, so none is given. Nothing is filled from a sibling model, a different model year or a dealer listing.
Read the label on the trailer
Federal rules put a load-carrying label inside every RV trailer: its unloaded weight with full propane, its cargo carrying capacity and its GVWR (49 CFR 571.110 and 571.120). Those figures come from the trailer itself and govern the towing decision.
05 How it compares
12,721 lb dry and 14,500 lb GVWR, against this model’s 13,031 lb and 15,000 lb.
13,080 lb dry and 15,500 lb GVWR, against this model’s 13,031 lb and 15,000 lb.
06 Loading it for a trip
A full 48-gallon fresh tank is about 398 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 20% of the Chaparral 373MBRB’s 1,969 lb cargo capacity, leaving 1,571 lb. Across 19 Chaparral floorplans the water share runs 13% to 22%, and 1 gives up more than this one. Nearest on that share: Chaparral 375BAF at 19% and Chaparral 389DEK at 22%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).
07 Where this floorplan sits
Closest sibling: the Chaparral 375BAF, nearest on the published figures. It differs on 6 of the 8 fields both publish (this plan first): dry weight 13,031 lb vs 12,422 lb; GVWR 15,000 lb vs 14,500 lb; cargo capacity 1,969 lb vs 2,078 lb; hitch weight 2,219 lb vs 2,152 lb; grey tank 120 gal vs 112 gal; black tank 75 gal vs 72 gal. They match on length and fresh tank.
| Chaparral plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 15,000 | 16–17 of 19 | 8,900–15,500 |
| Dry weight (lb) | 13,031 | 18 of 19 | 6,950–13,080 |
| Cargo capacity (lb) | 1,969 | 4 of 19 | 1,779–3,172 |
| Hitch weight (lb) | 2,219 | 16 of 19 | 1,115–2,708 |
| Length | 42 ft 6 in | 13–18 of 19 | 27 ft 3 in–42 ft 7 in |
| Fresh tank (gal) | 48 | 9–19 of 19 | 40–48 |
| Grey tank (gal) | 120 | 17 of 19 | 33–135 |
| Black tank (gal) | 75 | 17–18 of 19 | 33–90 |
Either side of it by GVWR: Chaparral 334FL matches it at 15,000 lb GVWR; Chaparral 367BH is 500 lb heavier (15,500 lb GVWR).
| Nearest Chaparral siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Chaparral 373MBRB | 42 ft 6 in | — | 13,031 | 15,000 | 1,969 | 2,219 | 48 |
| Chaparral 375BAF | 42 ft 6 in | — | 12,422 | 14,500 | 2,078 | 2,152 | 48 |
| Chaparral 381DBL | 42 ft 6 in | — | 12,186 | 14,500 | 2,314 | 2,040 | 48 |
| Chaparral 367BH | 42 ft 6 in | — | 12,328 | 15,500 | 3,172 | 2,194 | 48 |
| Chaparral 389DEK | 42 ft 4 in | — | 12,721 | 14,500 | 1,779 | 2,320 | 48 |
| Chaparral 355FBX | 42 ft 7 in | — | 11,542 | 14,500 | 2,958 | 2,008 | 48 |
All 19 Chaparral floorplans: Chaparral line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| Chaparral 373MBRB | 15,000 | 13,031 | — | 42 ft 6 in |
| Brookstone 344FL | 15,000 | 12,789 | — | 42 ft 2 in |
| ElkRidge 32RK | 15,000 | 10,607 | 4 | 36 ft 6 in |
| Mesa Ridge 376FBH | 15,000 | 12,240 | — | 42 ft 3 in |
| Shasta Phoenix 334FL | 15,000 | 12,400 | — | 42 ft 6 in |
| Avenue 35RKS | 14,995 | 11,450 | — | 36 ft 10 in |
| Model Z 2810 | 14,995 | 11,894 | — | 34 ft 9 in |
Against the Chaparral 373MBRB: the ElkRidge 32RK is 6 ft shorter.
08 Common questions about the Chaparral 373MBRB
How much does the Chaparral 373MBRB weigh?
13,031 lb dry; 15,000 lb GVWR, the most it may weigh loaded.
How much can the Chaparral 373MBRB carry?
1,969 lb, 13% of its GVWR (median across 334 fifth wheels here: 18%). A full fresh tank uses 398 lb of it.
What is the pin weight of the Chaparral 373MBRB?
2,219 lb as published, 17% of the dry weight (median across 540 fifth wheels here: 19%).
What size tow vehicle does the Chaparral 373MBRB need?
A tow rating of at least 15,000 lb, plus payload for the loaded pin weight, passengers and cargo.
What are the tank capacities on the Chaparral 373MBRB?
Fresh 48, grey 120, black 75 gallons. Off hookups, fresh water runs out first.
How long is the Chaparral 373MBRB?
42' 6" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
10 of the 18 fields this catalogue tracks are published for the Chaparral 373MBRB. Not published: exterior width, interior height, sleeps, slide count, axle count, refrigerator, air conditioning, tire size (a description is published, a size is not).
Sourcing rules: methodology.
10 Manuals & documents
Sources: forestriverinc.com, library.rvusa.com (linked below); the full source note is at the foot of the page.