A monster truck is a stock pickup truck, which has been modified or purposely built with extremely large wheels and suspension. There are over 500 monster trucks in the world of which about 100 are full blown racing trucks. Others are exhibition, car crushers, ride trucks, or promotions vehicles. This majority are in the US. The costs involved are just too high for most individuals without a sponsor or a business purpose.
These enormous trucks emit deafening sounds, thick clouds of exhaust, and visions of extreme physical force as they fly into the air crushing piles of cars or performing free-style stunts. Monster trucks has been driven at over 80 miles per hour. On the quickest courses, drivers usually can get the truck up to 65-70 mph in a 300-foot span. Typically indoors, drivers max out at 25-30 mph.
The drivers get into the fiberglass body trucks through a hatch in the floor cab. On a older trucks the driver would open the door, grab hold of grab handle and pull themselves into the truck. The hatch is definitely easier. Drivers wear a standard 5 way racing harness, helmets and special fire resistant suits, gloves, and helmet liner. The tires weigh about 900 lbs. and are 60 inches tall by 43 inches wide with about 10 psi of air.
These trucks can run up and over most man-made barriers, so they are equipped with remote shut-off switches, called the Remote Ignition Interuptor to help prevent an accident if the driver loses control at any time.