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If the screws are not marked, you will have to find out by trial and error. Turn
one of the screws counting the number of turns and watch the rear derailleur. If it
does not move, you are turning the wrong one. Turn back the counted rotations to
find its original position.
Turn the screw clockwise to shift the rear derailleur towards the wheel and
anticlockwise to shift it away from the wheel.
Continue by shifting the rear derailleur to the largest sprocket. Be careful as
you do so, as not to let the rear derailleur collide with the spokes. When the
chain runs on the biggest sprocket, see whether you can take the rear derailleur
even further by moving the shift lever to the end of its travel. Then press the rear
derailleur further towards the spokes by hand. Spin the wheel. If the derailleur
cage moves towards the spokes or if the chain begins to move beyond the largest
sprocket, the derailleur movement range needs to be limited. Turn the limit screw
marked “L” clockwise until the rear derailleur is clear of the spokes.
Front Derailleur
Adjusting the front derailleur is a delicate job. The range within which the front
derailleur keeps the chain on the chainring without itself touching the chain is very
small. It is often better to let the chain drag slightly on the derailleur than to risk
having the chain fall off the chainring, which would block the drive. The swivelling
range is reduced in the same way as with the rear derailleur, i.e. by turning the limit
screws marked “H“ and “L“. This is a job you should leave to your STEVENS dealer.
As with the rear derailleur, the cable of the front derailleur is subject to length-
ening and hence to reduced precision in gear changing.
If necessary, shift to the small chainring and increase the tension of the
Bowden cable by turning the adjusting bolt through which it passes at the entry
to the gear shifter.
Caution:
Adjusting the front and rear derailleur accurately is a job for an experienced
mechanic. Also observe the operating instructions of the brake manufac-
turer on our website at www.stevensbikes.de/manual. If you have any
problems with the gears, contact your STEVENS dealer.
Danger:
Adjusting the front de-
railleur is a very delicate
job. Improper adjust-
ment can cause the
chain to jump off, thus
interrupting suddenly the
drive force. There is the
risk of accident!
Danger:
Be sure to go on a test
ride in a place free of
traffic, after adjust-
ing the gears of your
bicycle.
Caution:
Always check after an
accident whether the
guide plates of the front
derailleur are still paral-
lel to the chainrings!
Danger:
Before using your new
Di2 gear be sure to do a
test ride in a place free
of traffic and read the
operating instructions of
the gear manufacturer.
Note:
In the case of a
12-speed gear
the ad-
justing mode is activated
via a button on the rear
derailleur. The indicator
light on the rear derail-
leur lights up yellow.
Further adjustment is
performed in the same
way as described in the
adjacent chapter.
Shimano Di2
Shimano’s Di2 is the electronic version of the high-end drive groupset from
Shimano. Instead of cables the signal is transmitted by wires. The rear and the
front derailleurs are moved by small electric motors. In case the chain runs too
oblique, the Di2 front derailleur is even readjusted automatically to avoid grinding
noises and unnecessary wear.
The electric motor on the front and rear derailleurs is powered by a recharge-
able battery integrated into the seat tube. Common button cells are integrated in
the shifters for signal transmission.
In case you want to change the function of the control buttons, contact your
STEVENS dealer. They need a special test device from Shimano to change the
function which is also used for troubleshooting.
Checking and Readjusting the Electric Gears
Clamp your bicycle into a workstand or ask a helper to hold your bicycle. Turn
the crank slowly and press the one of the two shifting switches repeatedly until
the chain runs either on the outer or on the inner sprocket. Adjust the limit stop to
Make sure that the chain does not move beyond the sprocket. Repeat the afore-
mentioned procedure in the other extreme position.
Shift the gear to the largest sprocket and to the smallest chainring. Turn the
crank slowly backwards and check whether there is enough space between the
pulley and the large sprocket. If this is not the case, turn the bolt positioned in the
rear clockwise.
Leave the chain on the chosen gear and adjust the front derailleur with the
bolt positioned towards the outside. The inner guide plate must be positioned
close enough to the chain to Make sure that the chain doesn't fall down and with
sufficient place to Make sure that it doesn't drag.
Shift to one of the medium gears. Press the button at the front switch under the
handlebar until the control lamp illuminates red. The rear derailleur can be finely
adjusted now. Turn the crank and listen to the noise of the chain while running.
If the chain doesn’t roll off noiseless, press the front button. With every push the
rear derailleur moves inward by one decimillimeter. If the noise gets louder, press
the rear button.
The rear derailleur moves towards the outside in steps of one decimillimetre.
Once the chain runs quietly press the button at the switch once again – the red
lamp goes off. Finish by shifting through all the gears to check the proper func-
tioning.
To limit stops are adjust as described in the chapter
“Checking and Read-
justing the Mechanical Gears”
.
