31
b d
To do so, shift to the smallest sprocket (a) and turn the clicking bolts
anticlockwise in half turns until the cable is slightly tensioned.
After tensioning the Bowden cable check whether the chain immediately
climbs onto the next larger sprocket. To nd out you either have to turn
the cranks by hand (b) or ride the bicycle and change gears.
If the chain easily climbs onto the next larger sprocket, check whether it
just as easily shifts to the small sprockets. You may need several tries.
Adjusting the front and rear derailleur accurately is a job for an
experienced mechanic. Please observe the instructions of the
gear manufacturer. If you have any problems with the gears,
contact your BMW partner.
Ask a helper to lift the rear wheel. By turning the cranks and
shifting through you can easily check the function.
6.3.2 Checking the Limit Stops.
The rear derailleur is equipped with limit screws which limit the move-
ment range of the derailleur, thus preventing the derailleur and chain
from colliding with the spokes or the chain from dropping off the small-
est sprocket. The limit screws are adjusted by your BMW partner or at
a bicycle specialist shop of your trust. They do not alter their position
during normal use.
If your bicycle has tipped over or the rear derailleur received a
blow, the rear derailleur or its mount might be bent. It is advis-
able to check its range of movement and readjust the limit
screws, if necessary, after such an incident or after mounting
new wheels on your bicycle (c).
Shift with the right shifting lever to the highest gear. The inner cable is
relaxed and the chain running on the smallest sprocket. Look from the
rear of the bicycle at the cassette and check whether the teeth of the
smallest sprocket and the teeth of the guide pulley are all in a perfectly
vertical line (d).
If necessary, correct the position by means of the limit screws. The limit
screws on rear derailleurs are often marked “H” for high gear and “L” for
low gear ((a) p. 32). In this case high gear stands for high transmission
ratio, i.e. with the chain running on the smallest sprocket.
c
a
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