Inflating tubes with a disc wheel
I bought a Topeak Pressure Rite presta valve adapter to inflate my tubes in case I have a flat during the race ( will be using aero jacket). I was playing around with it this morning, and it seems when I inflate the tube the pressure in the tire is much higher than what it shows on my bike pump. Is this a common finding? Is the pressure reading off because of the adapter piece? In the user manual it says that pressure will quickly rise to desired pressure and then decrease again when the check valve opens. This didnt seem to happen. I stopped inflating the tube at 100 PSI, usually inflate to 110. I was worried the pressure was too high.
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