E-Bike Viper Instruction Manual - page 9
9
The size, pressure rating, and on some high-performance tires the specific
recommended use, are marked on the sidewall of the tire .The part of this
information which is most important to you is Tire Pressure.
WARNING: Never inflate a tire beyond the maximum pressure marked on the
tire’s sidewall. Exceeding the recommended maximum pressure may blow the
tire off the rim, which could cause damage to the bike and injury to the rider
and bystanders.
The best and safest way to inflate a bicycle tire to the correct pressure is with a
bicycle pump which has a built-in pressure gauge.
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.
Tire Valves
The tire valve allows air to enter the tire’s inner tube under pressure, but doesn’t let
it back out unless you want it to. There is American Valve . The bicycle pump you
use must have the fitting appropriate to the valve stems on your tire.
The tires use a American valve, which is like the valve on a car tire. To inflate a
American valve tube, remove the valve cap and push the air hose or pump fitting
onto the end of the valve stem. To let air out of a American valve, depress the pin in
the end of the valve stem with the end of a key or other appropriate object.