ATV's skid way too much, driving around on all surfaces it's very easy to skid. In reality on bitumen I hardly ever skid and on dirt roads there might be a little bit of momentary or soft skidding. But usually there is no skidding. It makes the vehicles feel as though they have no traction and it reduces confidence in the vehicle, making it unrealistic. In reality, conservative driving will emulate Anti-Skid-Breaking most of the time.