The
Doughnut wheels, introduced in the Spring Fever Crate, as part of the Spring Fever special event are a collectible item that can be used to customize a player's Battle-Car. They provide no advantages while in use and are purely cosmetic.
There is a random chance to get them from the Spring Fever Crate, or by trading up 5 rare items from the same crate. They can also be traded between players.
The Doughnut wheels are classified as Very Rare.