I have a speed8 (2005) and I am trying to get a sigma sport 1600 wireless to work on it - I put in the tire size for 20x1.75 mph=0988 according to little manual. Are you all using km/h? I realize that I am not good at this stuff - so I am trying to figure out if I have completely put info in incorrectly. Sorry to ask such a basic question - but I am very confused. Also not yet impressed with 1600 - it only works intermittently. My cateye astrale is much easier to work.
Thanks.