I have Auto Pause set to "When stopped," which logically pauses the timer when I stop moving. However, when I start moving again, the 830 will not resume the timer until I hit 3.5 mph. Is this speed adjustable? When I am mountain biking and climbing a steep incline, I often won't hit 3.5 mph after coming out of a stop until I reach a flatter section. 3.5 mph seems a bit too fast in this case.