I could be wrong on this, but I believe that on one of those trucks, the tires are non-pneumatic. (Solid)
The lower one is the Terex Titan, a mining truck used in Canada when GM still owned stake in Terex. It's now in a museum setting in British Columbia, I believe.
The upper truck has some 3,000 HP, weighs nearly 1 million pounds, and can haul/dump up to 300 tons of material per trip, with a sustained top speed (I think) of some 40 MPH.
It's also a great DD, if you're into that sort of thing.
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"