Thanks! The sensor is attached tightly and very neatly with zip ties, and as long as it's working, I don't want to take it off. I'm not good with such and I'd probably never get it back on securely, and scratch my beautiful new bike in the process.

How much difference would measuring the circumference of the tires likely make to the computer's accuracy? It's a Bontrager computer on a women's Trek bike. Would the computer probably have a fairly accurate number for the bike's original equipment tires (700x35)? I'm just a casual rider and super-accuracy isn't needed. OTOH, I would like numbers reasonably close to what they should be. But usually when I start messin' with stuff that's not broken, I wind up wishing I'd left well-enough alone. Of course, pressing buttons wouldn't scratch my bike. But would I lose my other saved data if I reset?

That is an easy way to measure the circumference! Great tip-