Our 25.25 m (82’10”) long EcoCombis come in multiple forms, the set-up of this mobile panorama is called a B-Double. The tractor is a 2020 Volvo FH 4×2 with a 510 hp engine, I’d say it’s towing a field of red leaf lettuce. The Volvo’s drive axle has dual wheels, whereas the seven other axles roll on super singles.
Regarding extra long and heavy big rigs, the so-called Super EcoCombis are being field tested right now. Their maximum overall length is 32 m (104’12”), with a GVM rating of 72 metric tons (158,733 lbs). In practice, the tractor unit is towing two, standard sized semi-trailers. The second semi-trailer is coupled to a converter dolly. (photo courtesy of trailertotaal.nl)
The idea behind these warehouses-on-wheels: a further reduction of CO2 emissions, combined with an efficiency improvement. In Europe, some countries have already legalized the Super EcoCombi. A minimum of 10 hp per metric ton vehicle weight is no problem for both Scania and Volvo, as we speak.