Do I need to buy a speed & cadence sensor to measure speed when outdoor cycling

moonboom Registered Users Posts: 6
Apprentice Traveler
edited January 24 in TomTom Sports
I have purchased the spark 3 music watch and before I go out and buy a speed and cadence sensor will the watch already measure my speed when outdoor cycling without a speed and cadence sensor?

Thanks for your help


  • tfarabaugh
    tfarabaugh Posts: 16,936
    Yes, without a speed and cadence sensor it will measure speed based on GPS (it is going to do this even if you have a sensor as GPS overrides the sensor). All you will lose without a sensor is cadence information. You would need a sensor to get speed data indoors.

    I hope this helped answer your question. If so, please mark it as a solution so others can look for it if they have the same question.