What is the difference between a 14-tooth and a 15-tooth small sprocket?

[DiCassandra]

For the same model, a 14-tooth small sprocket provides greater starting power compared to a 15-tooth small sprocket, but the 14-tooth sprocket has a lower travel speed than the 15-tooth sprocket. This is because fewer teeth on the small sprocket result in greater starting power but reduce travel speed. Conversely, more teeth on the small sprocket reduce starting power but increase travel speed. Additional information: According to the transmission ratio, if the large sprocket has 45 teeth, changing the small sprocket to 15 teeth while maintaining the original transmission ratio requires the large sprocket to be increased to (45×15)÷14=48.21, meaning it needs to be increased to 48 teeth to roughly maintain the original speed ratio.