Similarly, what does a cadence sensor tell you?
Measuring cadence
Many cadence sensors for bikes are designed to attach to the left-side chainstay. A magnet attached to your crank arm passes the sensor, which in turn records how many times it goes past and then sends a signal to your bike computer.
Additionally, do I need cadence on my bike computer? As said it's good to train yourself into getting a good cadence on the bike as it's easy for even experienced cyclists to think that pushing a harder gear at a lower RPM is going to be faster because it feels harder. It's completely necessary imo - especially if you've never had one.
Consequently, how important is cadence in cycling?
By regularly working on your cycling cadence, you'll become a more efficient, faster, stronger rider. You'll fatigue less and be able to go longer and harder.
Do I need both cadence and speed sensor?
Speed and/or cadence sensors can be a little confusing, but hopefully this should help sort it out: some sensors only transmit speed; some sensors only transmit cadence; while a third type does both. For the most part, you won't need a speed or cadence sensor if your trainer transmits data directly.
