How do I get my Force to measure my activity while riding a bicycle?

[h158x]

Anyone found a good way to measure activity while riding a bike..either in a spin class or out on the road?

[SteveH]

Your fitbit is always going to struggle to track cycling accurately given it is designed for tracking steps. You would do better to manually log the activity:

https://help.fitbit.com/customer/portal/articles/176113-does-the-fitbit-tracker-accurately-track-cal...

[gerrymcd]

Monitoring activity in a spin class is best entered manually based on your percived effort (typically people burn 400 to 600 calories per class, more if you are a heavy male working hard, perhaps as many as 800 calories).   The alternative, which I prefer, is to use a heart rate monitor.  That gives a good(ish) estimate, plus it keeps you from working too hard and going anaerobic.