Originally Posted by
Noonievut
Am I correct that when using this computer on the road you do NOT need the speed/cadance sensor to track speed (because this is monitored via GPS)?
If I were to use this computer on the trainer indoors, I assume the speed sensor would be needed if I wanted to track speed.
Thanks.
No you do not need the speed sensor whenever the GPS can "see" the satellites. The GPS will give you location within a few feet and speed within some pretty precise limits. Of course while you are going up or down hills the speed shown on the unit will be a bit off. But, over the entire ride is will be more than accurate enough for just about any purpose. Speed sensors have their own inaccuracies that render them less than precise as well.
I would think a cadence sensor would be much more useful for indoor riding since you aren't actually going anywhere and a good workout is the goal.