After updating from unity 4 to unity 5, I've been having lots of problems with the wheelcolliders. I've been reading across google and these forums, and many says they are bugged. My problem is, as the title describe, they sink into the ground. It was working some time ago, but now it messed up. Here's what it looks like: Anyone knows how to fix this? Could it be caused by the center of mass? Please feel free to ask for additional info.