Percentage of grade - gotta love these hills!

[maillotpois]

Well, I can comment on elevation gain on mapmyride verses Garmin. Dh just did a ride yesterday that mapmyride said would be 3,500 feet of climbing and his Garmin said it was over 6,000. Almost double.

My Garmin registers "elevation change" and "climbing"...I would expect one to be double the other with the same start/finish point. Is that the possible explanation? Did he use the smoothing software as he uploaded it?

My other question would be: which Garmin? Is there barometric correction? Was it run through Garmin training center or just pulled from the unit itself?

Ok, that's 3 questions.