What features do we want to see in a future DIRT Rally game? in DiRT Rally Series Suggestions Posted November 8 · Edited November 8 by bn880 5 minutes ago, somethingthing said: "As for the spare wheel, its not clear if it adds any weight actually in the game, certainly not apparent for acceleration, it does affect physics for sure but its likely not "actual" physics. So it seems to be a bit of a patchwork/abstraction and not relying purely on adding a mass object at position xyz." Seems like guesswork to me. I was trying to go easy on you. As you said this " Do the wheel affect the actual physics on the car and not only the weight? " which is an assumption that is basically the reverse of the reality of the implementation. You can check yourself by analyzing some data logs, I've done that so I know. Some people can also feel the difference with extra tyres, but I haven't heard of a top driver tell me yet the acceleration or top speed is affected from their feeling.