Originally Posted by
cyccommute
Another plus of GPS occurs if you have multiple bikes. I used to have wired computers and needed multiple mounts and multiple calibrations. GPS doesn’t depend on wheel size for speed and distance.
Battery life is a lot better than it used to be. The unit I suggested has a battery life of 30 hours. My first GPS had a battery life of 8 hours and cost about 4 times what that unit does.
GPS is overkill for the OP.
Regular cycle computers are cheap enough that you can get one for each bike.
Mounts come with the computers not with GPS units (so, you have that backwards). It's generally good enough to use the list of circumferences (so, you are exaggerating the calibration issue). GPS-only distance tends to be a bit shorter than the actual distance (so, even that has issues).
30 hours is also still much shorter than the battery life of a regular cycle computer (which can easily be much as a year).
The significant benefit of a less expensive GPS unit is to record your track.
If one has no interest in that, a GPS is not the best choice.