[nitinleew]

I just bought a Serfas FP-200 floor pump and I tested it out on my mountain bike just to see how accurate the pressure gage on it was. I pumped the tire up to 40 psi (according to the pump) and check the pressure with 3 different tire gauges. All three gauges read 45 psi. I wanted to use the pump on my road bike but I'm a little worried it will not be as accurate as I want. Should I just return the pump, buy a cheaper one, get a presta pressure gauge, and call it a day? Or is there a way to adjust the pressure reading on the gauge itself?

Thanks

[speedfreak]

I suspect this is only a minor issue although a difference of 5 psi is something to worry about. Try doing couple of tests and see whether it averages out to the tire gauges, if not, get it checked from the dealer.

[Devil]

Very common for the pumps to have dodgy gauges. Best to get yourself a decent gauge that you can keep on the bike so whereever you're pumping up the tyres, you'll get the right pressure.

[proximityinfotech4]

I pumped the tire up to 40 psi (according to the pump) and check the pressure with 3 different tire gauges. All three gauges read 45 psi. I wanted to use the pump on my road bike but I'm a little worried it will not be as accurate
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