Quote Originally Posted by Blueberry View Post
Mine quite frequently tells me I'm climbing a 17% grade when I'm descending and the reverse. Doesn't seem to be any rhyme or reason to it that I can tell (i.e., doesn't only happen in one spot). I don't usually ride with other electronics except a cell in my saddle bag. Who knows....

ETA: For distance, I believe it to be accurate. It's just grade that's so bad for me.
That is bizarre! I can't say I've experienced that with mine, just greatly exaggerated grade readings while climbing (26% on a 17%, for example). Also, fluctuating speed readings.