Which tire skid marks tend to be darker?

The reason front tire skid marks tend to be darker is primarily due to the weight distribution of a vehicle and the dynamics of braking. When a vehicle brakes, a significant amount of its weight shifts forward, resulting in increased pressure on the front tires. This added pressure leads to greater friction between the front tires and the roadway surface, which leaves behind more substantial and darker skid marks.

Front tires also generally contribute more to the braking force during a stop, as they bear more of the vehicle's weight and experience greater traction with the road. This phenomenon can be particularly pronounced during emergency braking situations where the front tires lock up due to the excessive weight transfer and braking force.

In contrast, while rear tire skid marks can certainly occur, especially in cases of rear-wheel skidding or loss of control, they typically do not have the same level of darkness as front tire skid marks under normal braking conditions. Therefore, the indication that front tire skid marks are darker under typical braking scenarios holds true.