Merida Bike Manuel d'utilisateur télécharger pdf (Page 24)

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8. Adjusting the bike to the rider

8.2 Adjusting the height of the

handlebar

The height of the handlebar determines the incli-

nation of the upper body. Lowering the handle-

bars gives the rider 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 com-

fortable because it increases the strain on your

wrists, arms, upper body and neck.

Handlebars with conventional stems only

allow limited adjustment of height by moving

the stem up or down inside the fork tube.

To change the height of handlebars with an

adjustable stem, all you have to do is loosen

and retighten a few bolts. In the case of the

threadless system, the so-called Aheadset sys-

tem, the stem is part of the headset. Adjusting

the height of this type of stem is more difficult,

because it means dismantling and reassem-

bling the stem.

The stem is one of the load bearing

parts of your bike and changes to it

can impair your safety. If you are not sure

about how to adjust the stem, your MERIDA

dealer will be pleased to help you.

8.2.1 Conventional stems

Release the expander bolt by two to three

complete turns. You should now be able to

turn the stem freely inside the fork.

If this is not the case, release the bolt by tap-

ping it softly with a hammer. With most Allen

bolts, you will ﬁrst need to stick the Allen key

into it, because they will probably be counter-

sunk and therefore impossible to be hit direct-

ly. Then gently tap the key with the hammer.

Never try to unscrew the top race when you

only want to adjust the stem, as you will oth-

erwise alter the bearing play. These top races

serve the purpose of modifying the bearing

play.

Now you can move the handlebars and stem

up and down as a whole. Do not pull the stem

out beyond the mark on the shaft! According

to the CEN-standard, the minimum inserted

length should be 2.5 times the diameter of

the stem shaft.

In any case, a deeper insertion depth means

higher safety.

Align the handlebars so that they are sym-

metrical to the front wheel when riding

straight-ahead.

Tighten the expander bolt. Make sure not to

exceed the maximum permissible torque.

insertion depth

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