Do you have a speed/candence/power meter fitting on either bike? If the answer is no, then fire away - the Garmin won't know or care what bike it's on. If the answer's yes, then you can still fire away, but you'll need to set up multiple bike profiles so the Garmin knows which sensors are on which bike.
Do you have a speed/candence/power meter fitting on either bike? If the answer is no, then fire away - the Garmin won't know or care what bike it's on. If the answer's yes, then you can still fire away, but you'll need to set up multiple bike profiles so the Garmin knows which sensors are on which bike.