Forum Unity Support How to make a physically real,stable car with WheelColliders + Reply to Thread ) to 0.01-0.03 to have more realistic tyres, but even in that case the car will roll over when stering at certain (low) speed. Q: But real cars don't roll over so easily. Why? A: Because real cars have STABILIZER BARS (aka anti-roll or anti-sway bars) http://auto.howstuffworks.com/question432.htm