For me the gold standard has always been Flaig. I used it exclusively back when I was road racing motorcycles. You can set the zero point, it's rugged, and they list an accuracy of +/-1 percent. No battery, just works. I tend to disregard measurement products where the manufacturer doesn't list how accurate they are. Haven't tried using one for presta valves though.
May 12, 2020, 11:33 p.m. - dave_f
For me the gold standard has always been Flaig. I used it exclusively back when I was road racing motorcycles. You can set the zero point, it's rugged, and they list an accuracy of +/-1 percent. No battery, just works. I tend to disregard measurement products where the manufacturer doesn't list how accurate they are. Haven't tried using one for presta valves though.