The Stern wheel is a collectable item in the game that is used to customize the player's vehicle further. It provides no advantages while used and is simply cosmetic. It is categorized as a common wheel but painted variants are categorized as exotic (uncommon before August 4, 2017) and can only be obtained by trade-up.
This wheel is available upon starting the game for the very first time. The Alchemist, Almas, OEM and Vortex wheels are also available at start.
It cannot be traded to other players since every account will have one. However, painted variants can be traded.