01 What makes it unique
Venture RV lists the 2015 Sonic Sport 18BS at 2,633 lb dry, a GVWR of 3,500 lb, a net carrying capacity of 867 lb and a tongue weight of 356 lb. Its dry weight plus its carrying capacity comes to exactly its GVWR.
It is 20' 6" long and 100" high. Venture RV prints its tanks as 20 gal fresh, 15 gal grey, 15 gal black.
Among the 6 Sonic Sport floorplans Venture RV’s Sonic Sport flyer (filed in Venture RV’s 2015 brochure folder; the flyer prints no year) lists with a published dry weight, it is number 4 from the lightest, in a range from 2,263 lb (Sonic Sport 15BH) to 2,740 lb (Sonic Sport 180). Every figure in that comparison is Venture RV’s, for the same model year.
Every number on this page was read on 6 Nov 2026 from Venture RV’s Sonic Sport flyer (filed in Venture RV’s 2015 brochure folder; the flyer prints no year); model year 2015 comes from where the maker files it on its own site, not from the document’s text.
How the 18BS differs from the other five Sonic Sport floorplans. Most distinctive first. How these ranks are worked out.
- Dry weight, 2,633 lb: third-heaviest of six, between the 160 and 18BH (2,623 lb) and the 17RBT (2,696 lb).
- Cargo capacity, 867 lb: third-largest of six, between the 17RBT (804 lb) and the 160 and 18BH (877 lb).
- Cargo capacity as a share of GVWR, 24.8%: third-largest of six, between the 17RBT (23%) and the 160 and 18BH (25.1%).
- Tongue weight, 356 lb: third-heaviest of six, between the 18BH (346 lb) and the 160 (366 lb).
- Tongue weight as a share of dry weight, 13.5%: third-smallest of six, between the 18BH (13.2%) and the 180 (13.7%).
- Black tank, 15 gal: third-smallest of six, between the 15BH and 18BH (9 gal) and the 17RBT (24 gal).
- Exterior height, 8 ft 4 in: lowest of six, level with the 18BH; next is the 15BH (8 ft 5 in).
- Length, 20 ft 6 in: shared with the 18BH; of six, three shorter and one longer, nearest the 160 (19 ft 9 in) and the 180 (22 ft 1 in).
- Grey tank, 15 gal: smallest of six, level with the 15BH and 18BH; next are the 160, 17RBT and 180 (32 gal).
Next to the 160, the nearest lighter floorplan by dry weight, the 18BS is 10 lb heavier by dry weight, has 10 lb less cargo capacity, has a tongue weight 10 lb lighter, is 9 in longer, stands 3 in lower, has a grey tank 17 gal smaller and has a black tank 17 gal smaller; the two publish the same GVWR, interior height and fresh tank.
Next to the 17RBT, the nearest heavier floorplan by dry weight, the 18BS is 63 lb lighter by dry weight, has 63 lb more cargo capacity, has a tongue weight 20 lb heavier, is 1 ft 8 in longer, stands 11 in lower, has a grey tank 17 gal smaller and has a black tank 9 gal smaller; the two publish the same GVWR, interior height and fresh tank.
02 Full specifications
Dimensions
- Exterior length
- 20' 6"
- Exterior height
- 100"
- Exterior width
- 84"
- Interior height
- 75"
Weights
- Dry / unit base weight (UVW)
- 2,633 lb
- GVWR (max loaded)
- 3,500 lb
- Net cargo / payload (CCC)
- 867 lb
- Hitch / tongue weight
- 356 lb
Capacities
- Fresh water
- 20 gal
- Grey water
- 15 gal
- Black water
- 15 gal
Running gear
- Hitch type
- Bumper pull
- Tire size
- Not published by Venture RV
Sleeping & layout
- Sleeps
- Not published by Venture RV
- Model year source
- The flyer prints no model year; Venture files it under /brochures/2015/ (venture-rv.com/brochures/ groups it under 2015) and the file name reads 2015-Venture-RV-Sonic-Sport-Flyer.pdf. PDF CreationDate (Mar 2014) not used.
- Weight note (as printed)
- "*These weights reflect the base weight for each model. Your trailer weight will vary according to optional equipment."
- Tire Size (as printed)
- 14" Radial
- Axle Weight
- 2277
- Code conflict (as printed)
- Table column reads "Sport 18BS"; the floorplan caption reads "18SB SONIC SPORT". Code taken from the table.
How these published figures sit against the rest of the catalogue: travel trailer tongue weight by size; 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 (3,500 lb) and the upper loaded tongue estimate (525 lb, a rule of thumb). Your vehicle’s placard and the trailer’s own weight label govern.
Loaded range: 10–15% of GVWR on the tongue, 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 Sonic Sport floorplan family
Venture RV’s Sonic Sport flyer (filed in Venture RV’s 2015 brochure folder; the flyer prints no year) lists 6 Sonic Sport floorplans; every one with a printed weight has a page here.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| Sonic Sport 15BH | 17' 2" | — | Profiled |
| Sonic Sport 160 | 19' 9" | — | Profiled |
| Sonic Sport 18BH | 20' 6" | — | Profiled |
| Sonic Sport 18BS | 20' 6" | — | Profiled |
| Sonic Sport 17RBT | 18' 10" | — | Profiled |
| Sonic Sport 180 | 22' 1" | — | Profiled |
Venture RV’s Sonic Sport flyer (filed in Venture RV’s 2015 brochure folder; the flyer prints no year) lists 6 Sonic Sport floorplans. Every one with a printed weight has a page here.
04 Notes on this floorplan
What Venture RV does not publish for the Sonic Sport 18BS
Venture RV prints no tire size, 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
2,623 lb dry and 3,500 lb GVWR, against this model’s 2,633 lb and 3,500 lb.
2,696 lb dry and 3,500 lb GVWR, against this model’s 2,633 lb and 3,500 lb.
06 Loading it for a trip
A full 20-gallon fresh tank is about 166 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 19% of the Sonic Sport 18BS’s 867 lb cargo capacity, leaving 701 lb. Across 6 Sonic Sport floorplans the water share runs 15% to 22%, and 2 give up more than this one. Nearest on that share: Sonic Sport 160 at 19% and Sonic Sport 17RBT at 21%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).
07 Where this floorplan sits
Closest sibling: the Sonic Sport 18BH, nearest on the published figures. It differs on 4 of the 8 fields both publish (this plan first): dry weight 2,633 lb vs 2,623 lb; cargo capacity 867 lb vs 877 lb; hitch weight 356 lb vs 346 lb; black tank 15 gal vs 9 gal. They match on length, GVWR, fresh tank and grey tank.
| Sonic Sport plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 3,500 | 2–6 of 6 | 2,800–3,500 |
| Dry weight (lb) | 2,633 | 4 of 6 | 2,263–2,740 |
| Cargo capacity (lb) | 867 | 4 of 6 | 537–877 |
| Hitch weight (lb) | 356 | 4 of 6 | 336–376 |
| Length | 20 ft 6 in | 4–5 of 6 | 17 ft 2 in–22 ft 1 in |
| Fresh tank (gal) | 20 | 2–6 of 6 | 10–20 |
| Grey tank (gal) | 15 | 1–3 of 6 | 15–32 |
| Black tank (gal) | 15 | 3 of 6 | 9–32 |
Either side of it by GVWR: Sonic Sport 18BH matches it at 3,500 lb GVWR.
| Nearest Sonic Sport siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Sonic Sport 18BS | 20 ft 6 in | — | 2,633 | 3,500 | 867 | 356 | 20 |
| Sonic Sport 18BH | 20 ft 6 in | — | 2,623 | 3,500 | 877 | 346 | 20 |
| Sonic Sport 17RBT | 18 ft 10 in | — | 2,696 | 3,500 | 804 | 336 | 20 |
| Sonic Sport 160 | 19 ft 9 in | — | 2,623 | 3,500 | 877 | 366 | 20 |
| Sonic Sport 180 | 22 ft 1 in | — | 2,740 | 3,500 | 760 | 376 | 20 |
| Sonic Sport 15BH | 17 ft 2 in | — | 2,263 | 2,800 | 537 | 343 | 10 |
All 6 Sonic Sport floorplans: Sonic Sport line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry or base (lb) | Sleeps | Length |
|---|---|---|---|---|
| Sonic Sport 18BS | 3,500 | 2,633 | — | 20 ft 6 in |
| Sport 16RB | 3,500 | 2,860 | 4 | 16 ft 0 in |
| Bambi 16RB | 3,500 | 3,150 | 4 | 16 ft 3 in |
| Basecamp 16X | 3,500 | 2,700 | 2 | 16 ft 2 in |
| Bean Trailer Bean Stock X | 3,500 | 1,600 | 2 | 14 ft 0 in |
| Casita 15′ Patriot | 3,500 | 2,000 | — | 15 ft 0 in |
| Colt 13RD | 3,500 | 2,550 | 4 | 16 ft 1 in |
Against the Sonic Sport 18BS: the Sport 16RB is 4 ft shorter; the Bambi 16RB is 4 ft shorter; the Basecamp 16X is 4 ft shorter.
08 Common questions about the Sonic Sport 18BS
How much does the Sonic Sport 18BS weigh?
2,633 lb dry; 3,500 lb GVWR, the most it may weigh loaded.
How much can the Sonic Sport 18BS carry?
867 lb, 25% of its GVWR (median across 1,416 travel trailers here: 23%). A full fresh tank uses 166 lb of it.
What is the tongue weight of the Sonic Sport 18BS?
356 lb as published, 14% of the dry weight (median across 2,002 travel trailers here: 12%).
What size tow vehicle does the Sonic Sport 18BS need?
A tow rating of at least 3,500 lb, plus payload for the loaded tongue weight, passengers and cargo.
What are the tank capacities on the Sonic Sport 18BS?
Fresh 20, grey 15, black 15 gallons. Off hookups, fresh water runs out first.
How long is the Sonic Sport 18BS?
20' 6" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
11 of the 18 fields this catalogue tracks are published for the Sonic Sport 18BS. Not published: sleeps, slide count, axle count, tire specification, awning, refrigerator, air conditioning.
Sourcing rules: methodology.
10 Manuals & documents
Sources: venture-rv.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
No recall campaign or owner complaint in our NHTSA data names the Sonic Sport line. Read that as no result found, not as a clean record.
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 Sonic Sport line page.