I have had a Cycle Pump air gauge several for years. I just purchased another Cycle Pump air gauge. I notice the new one reads 4 more psi than the old one. For example, the old gauge reads tire pressure at 40 psi while the new gauge reads the same tire pressure at 44 psi. Is this typical? The gauge is pricey and I was hoping for good quality. While disappointing, I can live with it. I suppose I need to calibrate my gauges against a gauge I know is accurate. I am thinking about taking my bike to a shop and inflating it with their equipment and then checking my gauges, but that assumes the shop has accurate equipment and I suppose their stuff could be off too.

This reminds me of trying to set your watch to an accurate time source before modern technology made getting the correct time easy. Any suggestions?

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