Checking And Readjusting Derailleur Gears; Rear Derailleur - BMW Mountain Bike Enduro Owner's Manual

Pressing the large shifting lever of SRAm trigger shifters
under the handlebars with your thumb, shifts the chain to the bigger
chainrings and larger sprockets. The smaller shifter, also located under
the handlebars, but a bit higher than the big one, is pushed with the
thumb, too, and makes the chain move to the smaller chainrings and
smaller sprockets.
The principle of twist grips is different (b). Twisting the right-hand grip
towards you moves the chain to a larger sprocket giving you a lower
gear, while the same movement on the left produces a higher gear by
moving the chain to the larger chainrings. The shifting direction may vary
in this case, as well.
Practise switching gears in a place free of traffic until you are
familiar with the functioning of the levers or twist grips of your
bicycle.
It is therefore crucial when switching gears to continue pedal-
ling smoothly and without too much force. Do not shift under
load, as this will shorten the durability of the chain consider-
ably. Furthermore, this can lead to a chain-suck, i.e. the chain
can get jammed between chain stay and chainrings. Avoid
shifting gears while pedalling with force, in particular when
shifting with the front derailleur.
Avoid gears which involve an extremely oblique run of the
chain, as this will increase wear.
a
30
(a)
located
b
6.3 checking and Readjusting Derailleur
Gears.
If you have purchased your bicycle from a BMW partner, the derailleur
gears were carefully adjusted before delivery. However, Bowden cables
may stretch a little on the first kilometres/miles, making gear shifting
imprecise.
Adjusting the front and rear derailleur accurately is a job for an experi-
enced mechanic.
If you want to try adjusting it yourself, be sure to read the operating in-
structions of the manufacturer. If you have any problems with the gears,
please contact your BMW partner or a bicycle specialist shop of your
trust!

6.3.1 Rear Derailleur.

Increase the tension of the Bowden cable by turning the adjustable
cable stop at the shifting lever
runs into the rear derailleur of mountain, cruise and touring bikes (d).
Rear derailleurs are not all equipped with an adjusting bolt!
c
(c)
or the adjusting bolt through which it
d