Originally Posted by
ThermionicScott
I have a separate computer for each bike, as I track their mileage separately, and have three different tire diameters. Wired computers are pretty cheap.
Bingo. I've got "expensive" ($35) Cateyes on mine. Each one costs more than a Garmin mount, but less than any per-bike sensor add-ons (e.g., cadence and wheel sensor). A $5 battery lasts about 2 years, so upkeep is minimal, too.