When this game changed to a Clash game, it changed for the worse. You can upgrade all you want but it doesn't mean you'll be faster or more competitive. There is no sense to any of the physics. Just luck. It's not even pay to win because I have spent a little money to try and speed up my driver upgrades a little over the course of the years of playing this game but it's just a waste. Update: The game developer responded and said items give no advantage...