The car that makes a good start never exceeds this torque, so the tires don't slip. The car that makes a bad start exceeds this torque, so the tires slip. As soon as they start to slip, the torque drops down to almost zero. The interesting thing about torque is that in low-traction situations, the maximum amount of torque that can be created is determined by the amount of traction, not by the engine. The weight on the tire - The more weight on a tire, the more traction it has.
Weight can shift as a car drives.
For instance, when it makes a turn, weight shifts to the outside wheels. When it accelerates, weight shifts to the rear wheels. The coefficient of friction - This factor relates the amount of friction force between two surfaces to the force holding the two surfaces together. In our case, it relates the amount of traction between the tires and the road to the weight resting on each tire. The coefficient of friction is mostly a function of the kind of tires on the vehicle and the type of surface the vehicle is driving on.