Originally Posted by
DaveSSS
Digital gauges can be just as inaccurate as an analog gauge. I got three new analog gauges connected to a common manifold to agree within 2psi, which made me confident in all three. A plus or minus 1.5 psi accuracy winters gauge is about $20 on Amazon. A plus or minus 1 psi gauge with a certificate of accuracy is about $130 at McMaster-Carr. The winters gauges are good enough for me.
Agreed, the trick is to use the one gauge all the time, the pressure is then always relative to the same gauge. You also get used to what works for you +/- a few PSI. I use my digital gauge for 29x2.6 MTB tyres at 24PSI, all the way up to old school 700x23 at 100PSI.