That's fine, I also think it's a addon hookup local mod due that it's on a roof bar.
I love using the 2 axles container trailers, as they are shorter and doesn't cause as much troubles as a full length b-triple.
If you're interested to have more technical information about ETS2, about weight and performance, etc., keep on reading.
Did you know that the shortest owned two axles container (gooseneck) single trailer, weighing 2800 kg, is the lightest trailer ever in ETS2? No we're not going to count the dollies. But yeah that container trailer is lighter than the single axle curtain side trailer that is 4160 kg.
As for the "job" trailers (non owned by default), the lightest trailer is the Schwarmüller slide post (logs) at 5400 kg, while the SCS flatbed, gooseneck (container) and log trailers are at 5800 kg. I'm not going to include the dollies and center axles trailers though. The open top (yellow tipper) trailer is at 6500 kg, and the Schmitz kipper solid (tipper or s_ki_solid) trailer is at 6600 kg. All those numbers are when these trailers are empty.
Also, the Mercedes Actros 2009, in a 4x2 configuration, is the lightest chassis weighing only 6754 kg (combined kerb weight), without taking into consideration the 600 liters fuel tank, which would still make it the lightest chassis if we assume that one liter of fuel is 1 kg. Combine that with a 6 speed transmission, and your favorite engine (730 vs 750), and you will have a beast!
I'm not saying that the other trucks aren't good though, the Iveco Stralis 4x2 is 6775 empty tank and 8075 full tank. The Daf XF105 Euro 5 is 6917 empty, and 7917 or 8417 full tank, depending if you have extra tank capacity or not.
I've also read that someone mentioned that the Renault T is "good" and "faster" than some other trucks... Actually, it's among the heaviest trucks in a 4x2 configuration, at 7612 empty, and 8657 or 9087 full, depending if you have extra tank capacity or not. The Renault Premium is at 7657 empty, and 8657 full.
I've also been seeing people using 8x4 trucks with their small trailer (often 1 axle single trailer). Just a reminder that these trucks are among the heaviest, starting at 11900 kg (empty tank), and their turning radius is much higher. They are designed to haul heavy/oversize cargo.
Also, if you want to know the truth about which engine is the best between the Volvo and Scania, yes the Volvo has more torque than the Scania, by a whopping 50 NM!!! If you do care about that 0.14s difference with a 10 tons load (and 4.1 tons trailer), sure go ahead. I still prefer the Scania engine for the extra RPM, since the Volvo FH16 2009 is capped to 2300 RPM and the FH16 2012 is capped at 2000 RPM.
Although, the difference between 2300 and 2500 RPM can be insignificant depending on the scenario. The speed difference can be as much as 16 km/h for one of the highest top speed transmissions, which is already pretty hard to reach within the game... Performance wise, there's not much to gain to go as high as 2500 RPM, I rarely shift over 2000 RPM, but sometimes I like the feel of going as high as possible.
But in the end, it's still a matter of personal preferences, and yeah I might still be biased to lean towards Scania over Volvo.
Are you still hungry for even more technical information? Alright just keep on going.
Did you know that among all the trucks in a 4x2, 12 speed (direct drive) configuration, with their respective maxed out engines, no save editing implied, the fastest accelerating truck is... The Scania R 2016? It's actually 0.3 seconds faster than its S series brother without a trailer and 0.6 seconds faster with a 10 tons load (4.1 tons trailer). Why is that? It all comes to the speed at which the gearbox changes gear. The weight of the Volvo and Scania trucks in a 4x2 configuration are very similar, with a full fuel tank, except the Scania S, because it's 300 kg heavier... As for the transmission, well the Scania 2009 has a 0.9 shift speed (1.0 is default) for any of the 12 speeds or higher transmissions, and 0.7 for the Scania 2016. How much does it impact performances? We're speaking about roughly 1.5 seconds difference with that 10 ton loaded trailer.
Also, is there a big difference in performance between automatic without adaptive transmission, and with high power mode? The answer is simply no, the difference is insignificant. We're talking about 0.02 seconds faster with adaptive off, and 10 tons loaded trailer of course. You may not want to think about fuel economy at this point though... Also it might be better to shift at higher RPM with a 6 speed (up to 2000 RPM), due that some gears have a larger gap in gear ratios.
The fastest reverse speed can be achieved with a ZF 12TX2420TD or ZF 12TX2421TD R from a Daf XF Euro 6. But since its engine is limited to 2200 RPM, it'll limit you to about 66 km/h, vs 75 km/h with a 2500 RPM engine.
The top 3 trailer types with the most cargo choices are
Curtain side (131) which includes ADR explosives loads
Dry van (127)
Flatbed container (60) which includes both flatbed and container loads
And top 3 with the least choices...
Log (4) yep, that's right, it's cool looking, but really not that good
Flatbed brick (6) yeah shame there's not much choice either
Flatbed (21)
The heaviest gross weight possible in the game would be achieved with a full tank in the Mercedes Actros 2014 8x4, hauling a condensator (oversize), for a total of about 95.3 tons! That's if I didn't fail my math... Don't worry, I did them all in high school.
Heaviest weight for largest HCT of each type are
Curtain: 49.9T (bottled water)
Reefer: 47.0T (beverages)
Log: 45.6T (large tubes)
Flatbed: 51.1T (metal beams/reinforced bars)
Container (non-ADR): 43.4T (beverages container)
Container (ADR): 40.0T (heavy metal)
Lightest weight for smallest single trailer of each type are
Curtain: 1.7T (harvest bins)
Reefer: 1.0T (cut flowers)
Log: 18.7T (iron pipes)
Flatbed: 4.8T (vent tube)
Container (non-ADR): 2.6T (brake fluid)
Container (ADR): 3.6T (nitrogen)
And I hope that info can prove helpful, for making certain choices, whether it's during save editing or just playing. Also do note that some of these values come from the game files, some where calculated, and some were tested in-game.