TrucksShort review, description. Faymonville Powermax heavy truck semi-trailer 26.05.2022 /Photo: Faymonville Powermax Powermax self-propelled transport module from Faymonville for heavy loads (modular vehicle SPMT), number of axles 3 – 6.Specifications Faymonville Powermax:Number of axlesfrom 3 to 6