The bolt also comes with two mounts. I put the main mount on my roadie and the ziptie mounted one on my commuter. I can't see how having two computers on one bike would be easier than just twisting the Bolt off one and onto the other. It is just so simple, no wires. The Bolt comes with me when I vacation in case I find myself on a borrowed or rented bike too. I just keep it in my pocket to record the rides.

And the Bolt will record mileage even without a speed sensor using the GPS data. Why do you need anything else?