Bedienungsanleitung Winora Algemene (Seite 75 von 140) (Englisch)

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8 Headset

The headset (a) connects the fork to the frame, but allows it to move freely. It

must turn with virtually no resistance, if the bicycle is to run straight, stabilis-

ing itself as it travels. Shocks caused by uneven road surfaces expose the

headset to considerable levels of stress. In this way it can become loose and

go out of correct adjustment.

Riding the bicycle with a loose headset increases the stress on

fork and bearings. The fork can break and throw you off your

bicycle!!

8.1 Checking the Headset

Check the headset for play by placing your fingers around the upper head-

set cup (b).

Bring your weight to bear on the saddle, pull the front brakes with your other

hand and push the bicycle firmly back and forth with the wheel remaining

on the ground. If the bearing has play, you will feel the upper headset cup

moving relative to the upper bearing cap - visible as a small gap between

the cup and the cap.

To check whether the bearing runs smoothly, lift the frame up until the front

wheel no longer touches the ground. The handlebars should turn from far

left to far right without feeling roughness or tightness at any point. Turning

the bars should require only a little tap on the grips (c).

Adjusting the headset requires a certain amount of experience

and should therefore be left to your local bicycle dealer.

If you want to adjust conventional headsets you will need spe-

cial tools. If you nevertheless want to try adjusting it yourself,

please read the operating instructions of the manufacturer care-

fully before you do!

Check the secure seat of the stem after having adjusted the

bearings, by holding the front wheel between your knees and

trying to twist the handlebars relative to the front wheel (d). Oth-

erwise, a loose stem can throw you off your bicycle.

8.2 Readjusting a Conventional Headset

The adjustment tolerance between there being play in the bearings and

them being set too tight is very small. The bearings are susceptible to dam-

age. If you want to try it nevertheless, you need two large and flat open-end

wrenches (a).

Release the threaded top nut and tighten the upper threaded bearing cap a

little clockwise. Retighten the top nut.

A too tight adjustment may damage the headset and impair the

performance of the bicycle.

8.3 Readjusting an Aheadset

(*Aheadset

is a registered trade mark for threadless systems of DiaCompe)

The distinct feature of this system is that the stem does not sit within the fork

steerer tube, but rather slips over the fork steerer tube, which in this case is

threadless (b). The stem is thus an important part of the headset bearing. Its

clamping force secures the bearing in the correct running position. Instead

of special tools you need in most cases only one or two Allen keys as well

as a torque wrench to adjust the Aheadset

. Release the clamping bolt(s)

located on the side of the stem by one to two complete turns. Using an Al-

len key, gently tighten the countersunk adjusting bolt on top a little, e.g. by

a quarter turn (c).

Do not overtighten the upper bolt, it only serves the purpose of

adjusting the bearing play, not of securing the stem!

Re-align the stem with the frame so that the handlebars are not slanted

when the wheel points straight ahead. Make sure the front wheel is in line

with the top tube and the stem. Tighten the clamping bolts of the stem (d).

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 components and/or in the manuals of the com-

ponent manufacturers.

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