As of November 9, 2026, the most useful trailer mods for American Truck Simulator 1.61 are free and fall into three groups: real-company liveries, like SiSL’s Trailer Pack USA (more than 100 trailers in real company colours) or the Traffic Trailer Mega Pack (about 500); doubles and triples, like Punicron’s mods that bring them to the freight market; and heavy haul, like the Trail King Schnabel. Here they are by type, with version, size and requirements.
Summary: the best ATS trailer mods
| Mod | What it adds | Game version | Size |
|---|---|---|---|
| SiSL’s Trailer Pack USA | 100+ real-company trailers | Not stated | 809 MB |
| Traffic Trailer Mega Pack | About 500 trailers in traffic and freight | 1.61 | 1.24 GB |
| Freight Market B-Double Trailers | B-doubles in the freight market | 1.61 | 140.7 MB |
| Freight Market Turnpike Doubles | Turnpike, triples and Rocky Mountain | 1.61 | 69 MB |
| Triples & Doubles Unlocked | Removes the state limits | 1.61 | 671 KB |
| Trail King Schnabel | Oversize-load trailer | 1.61 | 792.8 MB |
| Single and Turnpike Double Lowboys | 2- to 12-axle lowboys | 1.61 | 852 KB |
| Arnook’s Container Pack | 300+ container liveries | 1.58 | — |
| Box Trailer Enhanced | Improved SCS dry van | 1.57 | 1.07 GB |
All are free except Jon Ruda’s pack. Versions are those stated by each author; if your game is newer, check the mod page.
Trailers with real company liveries
SiSL’s Trailer Pack USA adds more than 100 trailers in the colours of North American carriers, plus new models; it weighs 809 MB and its author doesn’t state a version. The Traffic Trailer Mega Pack gathers about 500 traffic trailers with real company liveries that also show up as freight jobs. For containers, Arnook’s Container Pack brings more than 300 liveries in 20, 40, 45 and 53 ft, with tanks, reefers, flat racks and open tops.
Doubles, triples and road trains
In ATS, doubles and triples are limited by state and by level. Punicron makes the most used mods to open them up: Triples & Doubles Unlocked removes the state limits (and allows 53 ft trailers in California), Freight Market B-Double Trailers brings B-doubles to the freight market with dry vans, flatbeds, hoppers, silos and tankers, and Freight Market Turnpike Doubles does the same for turnpike doubles, triples and Rocky Mountain doubles, without needing a garage or a high level.
- 0xferd’s B-Double/Triple SCS Box Trailers: 84 combinations with SCS dry, insulated and reefer vans.
- Tommygun’s Side dumper trains: side dump trains of 3 to 6 trailers.
- LKN194’s Full Trailer Unlock: the add-on for Realistic Cargo Weight users.
Heavy haul and lowboys
The Trail King Schnabel is an oversize-load trailer with several axle setups and chrome or painted finish. For lowboys, 0xferd’s Single and Turnpike Double Lowboys adds 2- and 3-axle lowboys and 5- to 12-axle turnpike doubles; Steerable SCS Trailers makes the axles of SCS lowboys steerable; and Expanded Lowboy Weight Capacity raises their maximum weight to more realistic figures. For something huge, the Caterpillar 785C is a nearly 76-tonne mining truck on a three-axle lowboy.
Ownable trailers and SCS upgrades
- Manac Steel Flatbed: a Manac steel flatbed you can buy as your own trailer.
- SCS Flatbed Tandem Sliding Chassis: the SCS flatbed with a sliding tandem in 45, 48 and 53 ft.
- Ownable Car Transporter: your own car hauler with 11 variants, Convoy-compatible.
- PolyFir’s Box Trailer Enhanced: the stock dry van with highly detailed models and working lights.
- Decorative ribbon: decorative tape and side lights in 10 colours for SCS trailers.
- More cargo: Lore Friendly Cargo Pack (100 cargos with the game’s fictional brands) and Jazzycat’s Military Cargo Pack (22 military cargos).
As a paid option, Jon Ruda’s USA Trailer Pack brings six ownable American trailers.
Compatibility
Livery packs usually coexist; mods that unlock doubles and triples touch the same definitions, so stick to one author’s set or check the mod page. If a trailer doesn’t show up in the freight market, see why ATS mods are not working and ATS mod load order.
More ATS guides: graphics mods, truck mods, best maps and how to install ATS mods.
FAQ
How do I get doubles and triples in every ATS state?
With Punicron’s Triples & Doubles Unlocked, which removes the state restriction, plus his Freight Market mods so they appear as jobs without a garage or level requirement.
Are there trailers with real companies?
Yes: SiSL’s Trailer Pack USA and the Traffic Trailer Mega Pack, plus Arnook’s Container Pack for containers.
Can I buy my own trailers with mods?
Yes: the Manac Steel Flatbed and the Ownable Car Transporter can be bought as your own trailer.
Are they free?
All except Jon Ruda’s USA Trailer Pack.