Originally Posted by
twobikes
When your tire with Schrader valve goes flat overnight seemingly for no reason, check to see if the valve core is not tight in the stem. Do this before removing the wheel from the bike and taking the tire off.
My road tires (Schrader valves) lose about one pound per day (90 psi to 60 psi in 30 days). Is this normal for road tires? I will check the valve cores. If not the valve cores, then what else.