I have the Rox 10.0 intensively tested a week, and everything worked fine ... Already right from the design and size can it still be called Radltacho, and frankly who wants to plant already this overpriced Garmin flatscreens on his racing bike, which have yet to their quirks ... The attachment to the bicycle has excellent solved Sigma, you can attach it to either directly centered on the stem or the handlebars. Of course, one thing is important to note the automatic start stop system makes sense only with the optional speed sensor on the front wheel. The speed measurement via GPS should turn this equal, because in bad GPS reception (rain break under a canopy) gets the speedometer different signals and calculates speeds, although the bike is ..