There's a difference between emergency braking and gentle/standard braking. Emergency braking you obviously need physical brakes on every wheel. With gentle bra

There's a difference between emergency braking and gentle/standard braking. Emergency braking you obviously need physical brakes on every wheel. With gentle braking you can use just the drive wheels, wherever they are, since they can obviously slow the truck down just as quickly as they can speed the truck up, and generally that's all you need.