Bedienungsanleitung Winora Algemene (Seite 101 von 140) (Englisch)

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14.2 Adjusting the Height of the Handlebars

The height of the handlebars determines how much your upper body will be

inclined forward. Lowering the handlebars gives you a streamlined position

and brings more weight to bear on the front wheel. However, it also entails

an extremely forward leaning posture which is tiring and less comfortable,

because it increases the strain on your wrists, arms, back, upper body and

neck.

There are three different systems that allow vertical adjustment of the han-

dlebars, i.e. conventional, adjustable and Aheadset

-stem. These systems

require special knowledge. In this regard, the descriptions hereafter may be

incomplete. If you have the slightest doubt, ask your bicycle dealer for help.

The stem is one of the load bearing parts of your bicycle.

Changes to it can impair your safety. If you are in doubt or if you

have any questions, please contact your bicycle dealer!

Stems come in varying lengths as well as shaft and binder tube

diameters (a). If you opt for a stem of inappropriate sizing, han-

dlebars and stem may break and result in an accident. When

replacing any parts be sure to only use parts that bear the ap-

propriate mark and, to be on the safe side, original spare parts.

Your bicycle dealer will be pleased to help you!

Make sure the handlebar-stem-combination is approved by the

handlebar and/or stem manufacturer.

Check whether the handlebar clamping surface of the stem is

free of sharp edges (b). Ask your bicycle dealer for professional

advice.

The bolted connections of stem and handlebars have to be

tightened to the prescribed tightening torques (c). If you disre-

gard the prescribed values, handlebars or stem may come loose

or break. Use a torque wrench and never exceed the maximum

tightening torque! You will find the prescribed values in chapter

“Recommended Tightening Torques”, directly on the compo-

nents and/or in the manuals of the component manufacturers.

14.2.1 Adjustable Stems

There are various solutions for adjusting the tilt of the front part of adjustable

stems (d):

Some designs use bolts on the sides of the joint, others have bolts coming

from above or below, and some versions are equipped with additional lock-

ing mechanisms or adjusting bolts.

Ask your bicycle dealer to explain you both function and adjust-

ment of your stem or let him do that work.

Release the side clamping bolt at the joint (a) by two to three turns at the

most, i.e. without unscrewing it all the way. If you still cannot move the stem,

it is being held in place by a ratchet or integrated locking mechanism. If the

stem is fitted with a locking mechanism, release the holding bolt located on

the top or bottom side (b) of the stem a little. In the case of a ratchet mecha-

nism you will find the bolt on the side.

Adjust the stem according to your needs.

Gently retighten the bolt of the locking mechanism, until it engages. Bolts lo-

cated on the side only have to be tightened gently. If there are no side bolts,

you have to tighten the bolt of the locking mechanism. If the stem of your

bike has a ratchet mechanism, make sure its surfaces engage snugly as you

tighten the side bolt. Retighten the bolt on the side of the joint, if necessary.

Any bolts located on the top or bottom side of the stem have to be released

as far as necessary to disengage the ratchet mechanism and to move

the front part. It is usually not necessary to remove the bolts completely.

Retighten the bolts after setting the stem to the desired height.

Changing the position of the stem alters the position of han-

dlebars, brake and shift levers. Readjust them as described in

chapter “Adjusting the Tilt of Handlebars, Bar Ends and Brake

Levers….“.

14.2.2 Conventional Stems

Handlebars with conventional stems allow limited vertical adjustment. This is

done by moving the stem up or down inside the fork steerer tube.

Release the expander bolt by two to three complete turns (c). The stem

should now turn freely inside the fork. If it does not, release the bolt by tap-

ping it gently with a rubber hammer.

With Allen bolts, you need to stick the Allen key into its head first, as it is

normally countersunk and therefore impossible to be hit directly. Then gently

tap the key with the rubber hammer (d).

Never try to unscrew the top race when you only want to adjust

the stem, as you will otherwise alter the bearing play.

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