Bike computer w/ GPS?

[Blueberry]

CA_in_NC, I've found my Polar to be pretty accurate. Start and stop altitude may be different but that is a factor of barometic altimeters which, from what I've read, are always more accurate than waypoint-based measurements (that's why Topozone, routeslip, etc., are always off).

Have you called Polar? Mine is very consistent with reading I get from a Ciclosport. However, maillotpois has commented that her Ciclo is always low. I have the luxury of two barometric altimeter readiings from the Polar and Ciclo so I get a better idea of real altitude gain/loss.

I gave up after working with the tech gurus at REI - they took it back (gotta love REI). I'd get back from a ride that had lots of climbing, and my computer would say that the cumulative elevation gain was -400. They had no explanation for it. I highly suspect it was a defective unit, but didn't want to fiddle with getting another one. I'll be looking for something else in the near future, but want to get something that's easily transferable between bikes - with 4 main bikes, it's pricey.

Carrie Anne

[Veronica]

I transfer my Polar between my two road bikes and my mountain bike. I have mounts on all three, speed sensors on all three, cadence on the two road bikes... I just have to switch bikes on the unit itself.

V.