Speed Boost (formerly called N2O) is a supply in Tanki Online. It can be triggered by pressing "4" in the keyboard, and it will increase the top speed of the player's tank by 30%, as well as the turret's rotation, for 45 seconds. It can be bought in the garage for 50 crystals each, starting at the rank of Gefreiter, and it is also available in the form of a drop box in-battle.