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The best and safest way to inflate a bicycle tire to the correct
pressure is with a bicycle pump that has a built-in pressure gauge.
WARNING!
There is a safety risk in using gas station air hoses or other air
compressors. They are not made for bicycle tires. They move a
large volume of air very rapidly, and will raise the pressure in
your tire very rapidly, which could cause the tube to explode.
Tire pressure is given either as maximum pressure or as a pressure
range. How a tire performs under different terrain or weather
conditions depends largely on tire pressure. Inflating the tire to
near its maximum recommended pressure gives the lowest rolling
resistance; but also produces the harshest ride. High pressures
work best on smooth, dry pavement.
Very low pressures, at the bottom of the recommended pressure
range, give the best performance on smooth, slick terrain such as
hard-packed clay, and on deep, loose surfaces such as deep, dry
sand.
Tire pressure that is too low for your weight and the riding
conditions can cause a puncture of the tube by allowing the tire to
deform sufficiently to pinch the inner tube between the rim and
the riding surface. This may also result in rim damage.
CAUTION!
Pencil type automotive tire gauges can be inaccurate and should
not be relied upon for consistent, accurate pressure readings.
Instead, use a high quality dial or digital gauge.
Ask your dealer to recommend the best tire pressure for the kind
of riding you will most often do, and have the dealer inflate your
tires to that pressure. Then, check inflation as described in Section
D.5 so you'll know how correctly inflated tires should look and feel
when you don't have access to a gauge. Some tires may need to be
brought up to pressure every week or two, so it is important to
check your tire pressures before every ride.
Some special high-performance tires have unidirectional treads:
their tread pattern is designed to work better in one direction than
in the other. The sidewall marking of a unidirectional tire will have
an arrow showing the correct rotation direction. If your bike has
unidirectional tires, be sure that they are mounted to rotate in the
correct direction.
Tech D
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