"DARK SIDE" is the name signifying riding a bike with a car tire on it. It came into being because most riders who have not tried it considered those who do to have taken their lives in their own hands, kinda' like they would regard someone who had taken up devil worshipping.So many who have done it and will not go back to regular MC tires, and the fact that they are STILL ALIVE, has somewhat taken the stigma from this evil practice, LOL.It is a choice, like helmet/no helmet, full gear/jeans and shirt, or any other practice considered abberant by one group or another. Ride it like you want to....just ride!