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English |
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Caution:
Handlebar or brake levers/shifters can damage the frame when they
are turned too far to the side. If you have a carbon frame this can lead
to cracks in the top tube. This is a typical damage of many bicycles and
therefore not covered by the warranty.
Carbon Handlebars
• Do not shorten, modify or change the handlebar or the stem.
• Make sure that the brake levers are always within easy reach.
Mounting Carbon Handlebars
Make sure that the stem and the handlebar always have matching clamp
diameters! Stems with a 31.8 mm clamping are for example only compatible with
handlebars with a clamping diameter of 31.8 mm.
Mounting non-matching parts may cause the clamping to fail and lead to a
serious crash. We recommend that you always combine components of the same
manufacturer, as they are designed to fit and function as an integrated system.
STEVENS assumes no responsibility for problems resulting from a carbon handle-
bars delivered by STEVENS being used with an unsuitable stem.
In case you prefer the stem of another manufacturer, contact their sales
department and get more information on the clamping diameter and combination
possibility with carbon handlebars. Also observe in this case the assembly instruc-
tions and warning information of the stem manufacturer.
Before mounting check all clamping surfaces of the stem for sharp edges and
burrs. Do not use such stems, but replace them instead. If you have no choice,
remove these sharp edges or burrs on your own. Replace the handlebar of an
existing stem, also check the handlebar after removal. Notches in the clamping
area indicate defective processing of the stem in these areas. If you fit a new stem
on a full carbon fork, check the steerer tube. Ask your STEVENS dealer in case you
have the slightest doubt and replace, if necessary, the damaged part. Your safety
should come first.
Make sure that the clamping areas are absolutely free of grease, especially
when the clamping surfaces are made of carbon.
Slide the stem onto the fork steerer tube. It should fit snugly onto the fork. Do
not fit stems which have play on the steerer tube. Use special carbon assembly
paste to increase the clamping force.
Mount your new carbon handlebar and make sure that it is accurately centred
in the stem. The handlebar should slide easily into the stem clamp. There should
be no play.
Tighten the greased bolts of the stem faceplate with your fingers by a few
turns. Tighten the bolts until the clamping slots between the stem body and the
faceplate are identical in width in the top and in the bottom area.
Tighten the fixing bolts alternately and in small increments to the minimum
limit of the recommended torque settings by using a torque wrench. In the case
of stems with four-bolt clamping, be sure to tighten the bolts in a cross pattern.
Check the reliable fit as described in the operating instructions. In case the han-
dlebar and the stem are still not tight enough, increase the torque value until you
have reached the maximum torque value.
Check the reliable fit once again as described in the operating instructions. If
a tight clamping of the handlebar in the stem or of the stem on the fork cannot be
achieved, the handlebar and the stem or the stem and the fork are not compatible.
Replace the stem by a suitable model.
Check the brake levers/shifters or the brake levers for burrs and sharp edges
in the clamping areas. Avoid rotatory movements during mounting in general to
avoid scratches.
After you have found the correct position of the brake lever/shifter units,
tighten the clamping bolts to the minimum value of the recommended torque
value. In case the brake lever/shifter units are still not tight enough, increase the
torque value until you have reached the maximum torque value specified by the
component manufacturer.
Note:
Prior to mounting, also read the instructions of the brake lever/shifter
manufacturer on our website at www.stevensbikes.de/manual
Note:
Some components have torque values printed or labelled on them. Be sure
to observe these maximum values. Also observe the instructions of the
component manufacturers on our website at www.stevensbikes.de/manual
Danger:
Do not exceed the
maximum torque values
specified by the stem,
handlebar or fork man-
ufacturers! Check the
torque values of all bolts
after 100 to 300 km (60
to 180 miles) of riding
and subsequently every
1,500 km (900 miles).
