The Rat Rod 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 the painted variants are categorized as exotic (uncommon before August 4, 2017) and can only be obtained by trade-up.
This wheel must be unlocked—like most of the common wheels—by playing the game normally through completed matches. Matches can be online or offline exhibitions.
It cannot be traded to other players since every account will have one. However, painted variants can be traded.