Changed the battery. Just got back from a ride and the same thing is happening. I did just recently change wheel sets but I don't see how this should make a difference. Speed I all over the place and by the end of the ride it basically just goes to almost zero and auto pauses. The distance on the way out is correct while iy comes up two miles short on the way back. Carl,I will take a look at that. It seems the bike cadence is the only thing working. Any other suggestions are appreciated. Only had this thing for about 3000 miles.