As above, yes. To track mileage between bikes, just set each bike up as a different "activity profile." I have 2 road bikes and a mountain bike, so I have set them up separately and named them in the activities list. Additional fun facts - if you use different activity profiles, you can set the data screens up differently for each one if you want. For example, if you only have power or cadence on one bike, you can set up the data screens for that bike to display or not display those features. You can also specify a default type of riding (road, mountain, etc) for each profile. Hope that helps.