01 What makes it unique
Heartland lists the 2027 Milestone 39TB at 15,375 lb dry, a GVWR of 17,700 lb, a net carrying capacity of 1,229 lb and a pin weight of 2,815 lb. Heartland’s own figures do not add up — a conflict, stated not resolved: 15,375 lb dry plus 1,229 lb carrying capacity is 16,604 lb, against a printed GVWR of 17,700 lb. All three are shown as Heartland prints them and none is corrected; the federal label on the trailer is the one to trust.
It is 43' 6" long and 13' 6" high. Heartland prints its tanks as 75 gal fresh, 137 gal grey, 100 gal black.
Every number on this page was read on 8 Nov 2026 from Heartland’s own 2027 Milestone model page for the Milestone 39TB, whose heading names the model year 2027.
How the 39TB differs from the other eight Milestone floorplans. Most distinctive first. Sibling pages may cover other model years than this one (2027). How these ranks are worked out.
- Dry weight, 15,375 lb: heaviest of nine; next is the 37MB (15,130 lb).
- Cargo capacity, 1,229 lb: smallest of three; next is the 36RK (2,340 lb).
- Grey tank, 137 gal: largest of three; next are the 36RK and 37MB (87 gal).
- Black tank, 100 gal: largest of three; next are the 36RK and 37MB (50 gal).
- GVWR, 17,700 lb: second-highest of nine, between the 36RK (16,000 lb) and the 37MB (17,900 lb).
- Pin weight as a share of dry weight, 18.3%: second-smallest of nine, between the 386BH (17.9%) and the 36RK (18.9%).
- Pin weight, 2,815 lb: third-heaviest of nine, between the 370FLMB (2,675 lb) and the 37MB (2,920 lb).
- Length, 43 ft 6 in: third-longest of nine, between the 380DSL (43 ft 4 in) and the 37MB (43 ft 8 in).
- Exterior height, 13 ft 6 in: tallest of nine, level with the 377MB; next are the 321FL, 333MB and 36RK (13 ft 4 in).
Next to the 37MB, the nearest lighter floorplan by dry weight, the 39TB is 245 lb heavier by dry weight, has a GVWR 200 lb lower, has 1,541 lb less cargo capacity, has a pin weight 105 lb lighter, is 2 in shorter, stands 3 in taller, has a grey tank 50 gal larger and has a black tank 50 gal larger; the two publish the same fresh tank and sleeping capacity.
02 Full specifications
Dimensions
- Exterior length
- 43' 6"
- Exterior height
- 13' 6"
- Exterior width
- 8' 6"
- Interior height
- Not published by Heartland
Weights
- Dry / unit base weight (UVW)
- 15,375 lb
- GVWR (max loaded)
- 17,700 lb
- Net cargo / payload (CCC)
- 1,229 lb
- Hitch / pin weight
- 2,815 lb
Capacities
- Fresh water
- 75 gal
- Grey water
- 137 gal
- Black water
- 100 gal
Running gear
- Hitch type
- Fifth wheel (pin box)
- Tire size
- Not published by Heartland
Sleeping & layout
- Sleeps
- Up to 8
- Model year (as printed)
- spec-table “Year” row 2027; page title “39TB 2027 - Heartland RV”
- Axles
- 2 x 8,000
- LP Tank Capacity
- 60 lbs
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, with end view
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 (17,700 lb) and the upper loaded pin estimate (4,425 lb, a rule of thumb). Your vehicle’s placard and the trailer’s own weight label govern. This floorplan’s published dry weight plus cargo capacity comes to 16,604 lb, which is not its published GVWR; the check uses the published GVWR.
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). The range starts at the published figure, because loaded is never lighter than that.
03 The Milestone floorplan family
The Milestone floorplans below were added from Heartland’s 2027 Milestone model page; every Milestone floorplan on this site, every model year, is listed on the Milestone hub.
| Floorplan | Nominal | Sleeps |
|---|---|---|
| Milestone 36RK | 40' 1" | Up to 2 |
| Milestone 37MB | 43' 8" | Up to 8 |
| Milestone 39TB | 43' 6" | Up to 8 |
The Milestone floorplans below were added from Heartland’s 2027 Milestone model page; every Milestone floorplan on this site, every model year, is listed on the Milestone hub.
04 Notes on this floorplan
What Heartland does not publish for the Milestone 39TB
Heartland prints no tire size and interior height 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
The weight label every RV trailer carries by law (49 CFR 571.110 and 571.120) governs the towing decision, not this page.
05 How it compares
15,130 lb dry and 17,900 lb GVWR, against this model’s 15,375 lb and 17,700 lb.
06 Loading it for a trip
A full 75-gallon fresh tank is about 622 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 51% of the Milestone 39TB’s 1,229 lb cargo capacity, leaving 606 lb (76 lb per rated berth). Across 3 Milestone floorplans the water share runs 22% to 51%, and this plan’s is the highest. Nearest on that share: Milestone 36RK at 27%. 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 Milestone 370FLMB, nearest on the published figures. It differs on 4 of the 5 fields both publish (this plan first): length 43 ft 6 in vs 44 ft 2 in; dry weight 15,375 lb vs 12,520 lb; GVWR 17,700 lb vs 15,500 lb; hitch weight 2,815 lb vs 2,675 lb. They match on sleeps.
| Milestone plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 17,700 | 8 of 9 | 15,000–17,900 |
| Dry weight (lb) | 15,375 | 9 of 9 | 10,845–15,375 |
| Cargo capacity (lb) | 1,229 | 1 of 3 | 1,229–2,770 |
| Hitch weight (lb) | 2,815 | 7 of 9 | 2,225–3,175 |
| Length | 43 ft 6 in | 7 of 9 | 37 ft 10 in–44 ft 2 in |
| Grey tank (gal) | 137 | 3 of 3 | 87–137 |
| Black tank (gal) | 100 | 3 of 3 | 50–100 |
| Sleeps | 8 | 4–9 of 9 | 2–8 |
Either side of it by GVWR: Milestone 36RK is 1,700 lb lighter (16,000 lb GVWR); Milestone 37MB is 200 lb heavier (17,900 lb GVWR).
| Nearest Milestone siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Milestone 39TB | 43 ft 6 in | 8 | 15,375 | 17,700 | 1,229 | 2,815 | 75 |
| Milestone 370FLMB | 44 ft 2 in | 8 | 12,520 | 15,500 | — | 2,675 | — |
| Milestone 380DSL | 43 ft 4 in | 8 | 12,865 | 15,000 | — | 3,175 | — |
| Milestone 377MB | 42 ft 11 in | 8 | 12,511 | 15,000 | — | 2,528 | — |
| Milestone 386BH | 43 ft 3 in | 8 | 12,456 | 15,000 | — | 2,233 | — |
| Milestone 37MB | 43 ft 8 in | 8 | 15,130 | 17,900 | 2,770 | 2,920 | 75 |
All 9 Milestone floorplans: Milestone line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| Milestone 39TB | 17,700 | 15,375 | 8 | 43 ft 6 in |
| Open Range 3X 393TBR | 17,700 | 15,260 | 10 | 44 ft 4 in |
| Pinnacle 38KPTS | 17,700 | 14,535 | 4 | 41 ft 0 in |
| Model Z 3420 | 17,695 | 14,794 | — | 39 ft 11 in |
| North Point 387FBTS | 17,650 | 14,830 | 4 | 42 ft 11 in |
| Cyclone 3511 | 17,800 | 13,875 | 6 | 41 ft 2 in |
| Torque 385 | 17,590 | 13,732 | 8 | 43 ft 5 in |
Against the Milestone 39TB: the Open Range 3X 393TBR sleeps 2 more; the Pinnacle 38KPTS is 2 ft shorter and sleeps 4 fewer; the Model Z 3420 is 5 lb lighter and 4 ft shorter.
08 Common questions about the Milestone 39TB
How much does the Milestone 39TB weigh?
15,375 lb dry; 17,700 lb GVWR, the most it may weigh loaded.
How much can the Milestone 39TB carry?
1,229 lb, 7% of its GVWR (median across 491 fifth wheels here: 19%). A full fresh tank uses 622 lb of it.
What is the pin weight of the Milestone 39TB?
2,815 lb as published, 18% of the dry weight (median across 727 fifth wheels here: 19%).
What size tow vehicle does the Milestone 39TB need?
A tow rating of at least 17,700 lb, plus payload for the loaded pin weight, passengers and cargo.
How many people does the Milestone 39TB sleep?
It is rated to sleep up to 8. No other Milestone floorplan here is rated for more.
What are the tank capacities on the Milestone 39TB?
Fresh 75, grey 137, black 100 gallons. Off hookups, fresh water runs out first.
How long is the Milestone 39TB?
43' 6" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
12 of the 18 fields this catalogue tracks are published for the Milestone 39TB. Not published: interior height, slide count, tire specification, awning, refrigerator, air conditioning.
Sourcing rules: methodology.
10 Manuals & documents
Sources: heartlandrvs.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 9 recall campaigns against the Milestone line (a recall and a complaint are not the same thing).
Recall coverage here is not complete, and complaints are owners’ unverified reports (how this record is built). Check a specific VIN at NHTSA before you buy. Full tables are on the Milestone line page.