Here's a problem I have. Mounting the gauge on a Presta valve lets air out. Yep the instructions document this. However they say 1.5 lbs. Even if you open the valve slightly, you still loose more PST than 1.5 . Oh I could over inflate the tube, then use the dynamic mode. It's just that I think a redesign where the pin is recessed enough, to allow the stem to be seated before it opens the valve, would be the way to go. Yes I spoke with support. T
The only test of actual accuracy is the accuracy of the guesses. One of the guesses was quite accurate indeed! However, to test actual accuracy, it's necessary to use a standard that's somewhat better than / different from a guess. Such as another gauge of *known accuracy.* If one of those is not readily available, comparing it to several other pressure gauges would reveal whether it's in the neighborhood of accurate.
Thanks! Then other problem with road bike tyres is that you feel EVERY bump and rock. They also "slip out" quite easily on gravelly turns. Happy riding! Thanks for the comment. Peace.
Thanks for the video. I have a problem though: it seems that the tool isn't calibrated; the tool marks 11 psi, while my floor pump shows around 30. I'm wondering if the tool is faulty? I looked on the web for a solution but can't find anyhing. Any help? Cheers
That is very odd. With such a huge difference in pressure, you should be able to tell which gauge is more accurate by "feeling" the tire. I typically find the gauges on floor pumps to be a little more "sticky" or less responsive, but I do not want to claim that that is the issue here. I would test the D2 against a couple other gauges to see if the one you have might be faulty. They have a good warranty and Topeak stands behind their products. Here is a safe link to download the manual as well (if you need it). Hope this helps: www.mediafire.com/file/q56wt245dnq2odo/Topeak_D2_Smart_Gauge_Manual.pdf/file
Maybe. If you are using it on a Presta valve, there is a CHANCE that in the mounting of it you have let air out of your tube. If you reapply the floor pump, and it reads 30psi, then this is not the cause.
Press tune -> pressure measurement will start to flash, every flash = new reading So you can see the pressure drop while you release air using the yellow button. While pressing the button, pressure reading will drop lower that the actual tire pressure because static and dynamic pressure.. And the pump gauge it's pretty close, not the D2! I also have a rock shox digital pump and the differences between them are 1psi. Measuring my fork... In my opinion the difference is caused by the fork small volume air chamber and by the small amount of air lost when I hookup the D2. First I measure with the shock pump.
@@costi08 Yep, that seems to be a problem with this gauge. Only workaround , is to over inflate the fork, then use the tune/dynamic button to lower the pressure.
