  Earth's atmosphere, on the other hand, is mostly nitrogen (78%) and oxygen (21%) with 1% being a mix of hydrogen, carbon dioxide and others. So you can see that Mars has much less atmosphere than the Earth does and oxygen make a proportionally much smaller fraction of of what there is than what we have on Earth.
Pickup trucks come in different shapes and sizes, and their weight entirely depends on the make and model. On average, a common pickup truck can weigh up to 3 tons, equivalent to 6,000 pounds.
A six wheel dump truck can haul about 10 ton. A 10 wheeler can haul about 16 ton. A tri axle can haull about 18 ton. Most dump trucks have 20', 22.5 or 24.5 tires in many different sizes.