The speed of a vehicle does not directly depend on the size of its wheels. The primary factors influencing the speed of a vehicle are the power and torque of its engine or motor, aerodynamics, weight, and transmission or gear ratios. While the size of the wheels can indirectly affect these factors, it is not the sole determining factor for the vehicle's speed.
Larger wheels can affect the overall gear ratio of a vehicle, which may have an impact on the speed at which the engine or motor operates. In general, larger wheels can result in higher top speeds at a given engine RPM because each revolution of the wheel covers more distance. However, this effect is relatively minor compared to other factors.
Other considerations associated with wheel size include the tire's rolling resistance, which can affect the overall efficiency of the vehicle, and the potential impact on the vehicle's suspension and handling characteristics. It's worth noting that increasing wheel size beyond certain limits may have negative effects on the vehicle's performance and handling.
Overall, while wheel size can have some influence on the speed of a vehicle indirectly, it is just one of many factors that contribute to the overall performance and speed.