Tern Quick Haul D7i Manuel D'utilisation page 33

rim. If the maximum pressure rating for the wheel rim is lower than the maximum pressure shown on the tire,
always use the lower rating. Exceeding the recommended maximum pressure may blow the tire off the rim
or damage the wheel 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 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.
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 1.D 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.
6.G.2. Tire Valves
There are primarily two kinds of bicycle tire valves: The Schrader valve and the Presta valve. The
bicycle pump you use must have the fitting appropriate to the valve stems on your bicycle.
The Schrader valve (fig. 25a) is like the valve on a car tire. To inflate a Schrader valve tire, remove the
valve cap and clamp the pump fitting onto the end of the valve stem. To let air out of a Schrader valve,
depress the pin in the end of the valve stem with the end of a key or other appropriate object.
The Presta valve (fig. 25b) has a narrower diameter and is only found on bicycle tires. To inflate a Presta valve
tire using a Presta headed bicycle pump, remove the valve cap; unscrew (counterclockwise) the valve stem lock
nut; and push down on the valve stem to free it up. Then push the pump head on to the valve head, and inflate.
fig. 25a, fig. 25b
WARNING: We highly recommend that you carry a spare inner tube when you ride
your bike. Patching a tube is an emergency repair. If you do not apply the patch correctly
or apply several patches, the tube can fail, resulting in possible tube failure, which could
cause you to lose control and fall. Replace a patched tube as soon as possible.
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