I have a Bontrager 4w that seems to be mysteriously picking up miles when on my bike rack while at work. I have on a few occasions found my computer reads a max speed of 187mph and accumulated a hundred miles or so while on my bike rack. I have a saris Thelma which does not allow the wheels to spin. I am not sure if it is getting this reading while sitting at the parking lot at work (in the sun) or while actually in transport. I will verify the reading today while transporting. My LBS says it could be the vibration between the sensor and magnet. Should I try a new battery? While actually riding the screen and all functions are normal.
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