There are 3 main types of roller coaster wheels:
- Running wheels - These wheels lay on the top of the track and are usually the largest.
- Side Friction wheels - These wheels run against the side of the track, either on the inside or outside. Their purpose is to prevent the train from flying off the side of the track.
- Upstop wheels - These wheels run against the bottom of the track. Their purpose is to prevent the train from coming up off of the track during air time moments. Some older roller coasters, such as the Scenic Railway, do not have these, and have to ensure that the train does not experience any zero or negative G-Force.
|Roller Coaster Descriptions|
|Basic Elements||Brake Run • Lift Hill • Launch Track • Station|
|Advanced Elements||Bunny Hill • Headchopper • Inversions • Pre-Drop • Tunnel|
|Lift/Launch||Lift Hill (Cable Lift • Lift Chain • Elevator Lift • Ferris Wheel Lift • Thrill Lift • Tilt Section)|
|Technology||On-ride camera • On-ride soundtrack • Train • car • Track • Transfer Track • Underfriction • Wheel|
|Other||POV • Queue Line • Rollback • Theming|
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