Resetting the mileage is not intuitive. Doesn't even follow the directions that are given. Holding the "A" button for 5 seconds takes you to the setting for holding the button for 3 seconds - reset the wheel size and mileage. Other than resetting the entire computer I have not found a way to clear average speed.I picked this one because it told you the temperature - I guess that's a feature I can do without.Agree with the other reviewer about 2 bike settings - one sensor - kind of useless feature if they don't sell you the additional equipment for ease of use.is equipped for two bikes but only one sensor is provided. That sensor is attached via zip ties so it's kinda locked to the 1st bike. There is no place online or at authorized dealer to allow one to get another sensor.