this Caterpillar 797B costs 5.5 million dollars, and the tires are 250,000 a set

Each dump truck driver makes about $55 an hour in Canada's oil fields, and with overtime, that's well into over a hundred thou a year

Each tire contains nearly 2,000 pounds of steel, enough to build two small cars and enough rubber to make 600 tires to put on them

the problem? No one has figured out to do with the huge tires when they are used up

How those enormous tires are mounted



https://www.flickr.com/photos/78047884@N07/sets/72157629988382829/
http://www.businessinsider.com/this-is-what-a-42500-tire-looks-like-the-5980r63-xdr-2012-5