Antigraviator is a 3D antigravity racing game that takes place in 2210. Scientific breakthroughs in terraforming and antigravity have paved the way for intergalactic tournaments. Your customizable racer is called a grav and you can upgrade its components and unlock various models once you do well in the various tournament leagues. Changing the color of your grav and its decals are free to do anytime though.
Source: N4G PC Antigraviator review – ChristCenteredGamer