Special Chests, are part of tournaments in Bike Race. In these types of chests you can find bikes or parts that range from rare to legendary. To open a special chest, 6 rubies are needed.
Possible bikes from special chests:
There are special chest events that give you a better chance of getting a certian type of bike for a certain amount of time. (Ex: 50% chance of getting a Turbo Bike or part for 8 hours, etc.)