TopeakSmartGauge D2 Digital Gauge(Return to Product Page)

Good thing I can also use this on my pickup tires otherwise I would return it. Not easy to see the gauge when attached to the tube. If you do it just right no air escapes but most of the time you lose air out of Presta stems. Easy to push the button that changes the measurement from PSI to BAR instead of the ON button. Not sure if the measurement is accurate.

I guess I'll start with what does work on this unit, it turns itself off very well, and very quick.It works fairly good with Schrader valves, but it's pitiful with Presta valves. It locks onto Presta valves so hard that the third or forth time I tried to remove it from the valve stem I literaly pulled the end off the gauge. You can be sure I'll never own anything else with the Topeak name, this was a wasted $20.00