36
37
Derailleur
The components of your bike that convert pedalling
power to propel the wheel forward are referred to as
the derailleur. These parts include the inside bearing,
pedal crank, pedals, cassette, gearhub and chain
and/or pulleys and belts.
With the derailleur, you can adjust your gear ratio and
thereby change the distance travelled by the wheel
per crank revolution. With a derailleur, a small front
chain wheel and a large rear sprocket correspond to
an easy gear ratio that is ideal for uphill travel. A large
gear ratio is achieved with a large front chain wheel
and a medium-sized to small sprocket on your cas-
sette. This ratio is suitable for high speeds on level
terrain. A gear hub offers multiple gear ratios with a
gear display.
Derailleur
With a derailleur, you should consider the diagonal
position of the chain. Attempt to avoid combinations of
a small chain ring and small sprocket and/or large chain
ring and a large sprocket. This reduces the lifetime of
your chain and/or the chain rings and sprocket.
Chain and chain ring.
Trousers with wide legs may
catch in the chain or the chain ring and cause a crash.
Wear trousers with tight-fitting legs or use leg bands
or clips.
WARNING
WARNING
Changing gears
With Shimano derailleurs, the shift levers are mounted
so that the lever for controlling the front derailleur
is located on the right handlebar and the lever for
controlling the rear derailleur is located on the left
handlebar.
For countries with right-hand traffic: Shift levers for
the front derailleur is located on the left handlebar.
Shift levers for the rear derailleur is located on the
right handlebar.
Shimano rapidfire shifters are designed so that each
shifter has a large and small lever. The large shifter
serves to change to the larger chain ring or sprocket,
the small lever changes to the next smallest chain ring
or sprocket.
Sudden loss of power and propulsion.
Shifting
under a load may cause the chain to slip or fall off
of the chain rings. The loss of power and propulsion
may cause a crash. When shifting, continue to pedal
without applying excessive force.
Summary of Contents for Porsche bike
Page 2: ...Porsche Bike RX ...
Page 3: ...Porsche Bikes Porsche Bike RS Porsche Bike ...
Page 46: ...www porsche com ...