Wooden roller coasters have tracks that are similar to a railroads. The tracks are braced by wooden cross ties and diagonal support beams. The roller coaster cart rests on an intricate lattice of wooden or steel beams like a house or a skyscraper. Wooden roller coasters can't do much more than go up and down, its difficult to do anything such as have inversions. Wooden roller coasters were the first type of coasters to be invented in 1884.
Steel roller coasters are much more complex compared to the wooden coasters. The tracks consist of long steel tubes and the wheels are made of polyurethane and nylon usually. The wheels run along the bottom of the track and other wheels that run along the sides of the track which keeps them secure to the track. Steel roller coasters can go upside down, up and down, and side-to-side. This coaster was introduced in the 1950's
Suspended roller coasters have a hanging cart that dangles from a track above. This allows the car and riders to swing side to side as the train races along the track. Due to the swing designs, these roller coasters cannot invert riders. You know you're on a suspended roller coaster if your feet are dangling. These coasters were first invented in the 1900's
Inverted roller coasters, or better known as loopy/upside down coasters are roller coasters in which the train runs under the track with the seats directly attached to the wheel carriage. This attribute is what sets inverted coaster apart from the older suspended coaster, which runs under the track, but "swings" in relation to the wheel carriage.The inverted coaster was invented in the early 1990s.