Bedienungsanleitung Stevens Allround Trekking Bikes - 2014 (Seite 39 von 83) (Englisch)

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7. The Wheels

The wheels of your bicycle create the contact to the road or track you are

riding on. They are subject to considerable stress through the weight

of rider, the luggage and through bumpy road surfaces or ground. Al-

though the wheels are manufactured with great care and delivered

accurately trued, this does not prevent the spokes from losing a little

tension on the first kilometres. Ask your STEVENS dealer to true up the

wheels after you have bedded them in over about 100 to 300 kilometres

(60 to 180 miles). Check the wheels regularly after you have run them in.

It will rarely be necessary to tighten the spokes.

The wheel consists of hub, spokes and rim. The tyre is mounted onto the

rim so that it encases the inner tube. There is a rim tape running around

the base of the rim to protect the sensitive inner tube against the spoke

nipples and the edges of the rim base, which are often sharp.

7.1. Tyres, Tubes, Rim Tapes, Valves, Inflation

Pressure

The tyres provide grip and traction on the road which is absolutely nec-

essary for braking, accelerating and taking turns.

In addition, they provide smooth running and riding comfort by absorb-

ing inferior shocks. The cross-country mobility or the inclination of the

road depends on the nature of the tyre carcass and the tyre tread. As

some of the requirements are mutually exclusive, there are many differ-

ent tyre types for different uses. Ask your STEVENS dealer to inform you

about the best tyre for you.

If you want to replace a tyre, you need to consider the actual size of the

old tyre. It is marked on the side of the tyre. There are two designations:

One of the sizes is the standardised size in millimetres which is more

precise, the number sequence 42 - 622 means that the tyre is 42 mm

wide when fully inflated and has an inner diameter of 622 millimetres.

The other designation for this tyre reads 28 x 1.60 which refers to inch-

es. Tyres have to be inflated to the correct air pressure in order to work

properly. Adequately inflated tyres are also more resistant to flats. An

insufficiently inflated inner tube can easily get pinched (“snake-bit-

ten”), when it goes over a sharp kerb.

The air pressure recommended by the manufacturer is given on the side

of the tyre or on the type label. The lower of the two pressure specifi-

cations makes for better cushioning and is therefore best for off-road

cycling. Rolling resistance decreases with growing pressure, but so does

comfort. A high tyre pressure is therefore most suitable for riding on

tarred roads. A higher pressure hardly means a lower resistance, it only

makes the tyre harder.

Ask your STEVENS dealer for advice. Inflation pressure is often given in

the old system of units, i.e. in psi (pounds per square inch). The table

on the right gives the most common pressure values in terms of three

systems. The tyre and rim alone are not able to hold the air. Therefore,

an inner tube has to be placed inside the tyre to retain the air pressure.

The tube is pumped up via a valve.

The Wheels

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Stevens Allround Trekking Bikes - 2014 Seite 39

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