Aussie Road Monster Headlines by Tristan Wiggill - August 22, 2017August 22, 2017 This enormous Liebherr mining excavator is the biggest load ever to be moved in Western Australia. It weighed over 700 tons, with four trucks towing and two pushing it. They averaged a speed of 4km/h on the gravel roads, reaching 6km/h on tar. The distance to the new mine was 230km and, driving up to 15 hours a day The distance to the new mine was 230km and, driving up to 15 hours a day, the convoy took six days to reach its destination – this also included becoming bogged down, with four front-end loaders having trouble pulling it out.