Installing taller tires on a vehicle would cause the vehicle's speedometer to:

When taller tires are installed on a vehicle, the circumference of the tire increases. This means that for each rotation of the tire, the vehicle travels a greater distance than it would with the original tire size. Since the speedometer is calibrated based on the original tire size, it measures the speed based on the number of rotations of the tire. With larger tires, the vehicle covers more distance in those same rotations, causing the speedometer to display a slower speed than what the vehicle is actually traveling. Therefore, the speedometer would read slower than the actual speed of the vehicle. This discrepancy is important for drivers to understand, as it can affect vehicle performance, fuel efficiency, and overall driving safety.