Hi Chuck_s,
Not sure about the word Traigo, but the tires in Europe are usually not pneu, but so-called solid resilients and not the solid press-on's (or cushion) tires typical for the US. The solid resilients are the standard in Europe. Generally the tire sizes are the same as pneu's but they are solid rubber. No metal ring as with cushions, rather the tire is pressed onto the same rim as a pneu. The comfort is generally better than cushion, primarily because there is more rubber to absorb bumps, and the tread often has deeper voids. This helps traction and adds appeal to the looks of the truck.