Before every ride, test your tires by putting all four fingers under
the rim and pressing down on the tread with your thumb. You should
also perform this test before and after inflating your tires, to check
whether the air you have been pumping actually went into the tire --
and to calibrate your thumb.

There have been a couple of times that I've wished that I were in the
habit of performing the thumb test after each rest stop.

--
joy beeson at comcast dot net
http://joybeeson.home.comcast.net/
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