I've never noticed a speed bug, instead it was constant crashes. But so far, there hasn't been any since I got Windows 10They work fine. SR2 runs without the speed bug that exists on 7.
If you played it on W7, you will notice that the whole game is a speed bug itself, the game is so fast that you can barely aim properly, plus the cars are 10x faster in a way you can't control them without mods.I've never noticed a speed bug, instead it was constant crashes. But so far, there hasn't been any since I got Windows 10