!
i
i
i
i
40
41
Gear hubs
The advantage of gear hubs lies in their enclosed
construction. In most cases, you can switch through
all gears with one shift operation. A thumb shift is
used to change gears. By pushing the large shifter
with your thumb, you will change to a higher gear.
By pushing the small shifter with your index finger,
you will change to a lower gear.
Adjusting gear hubs
Gear hubs must rarely be set or adjusted. Normally,
settings are only made using two marks on the hub
and their position by means of an adjusting screw on
the shifter.
Inside bearing and cranks
The inside bearing is normally an enclosed construction
containing the crankshaft and crank assembly. This
construction prevents dirt, water and mud from entering
and requires no maintenance. However, you should
check regularly to make sure the inside bearings in the
bottom bracket shell of the frame is firm.
Check to make sure both crank arms are securely
seated by shaking them; there should be no play.
Chain
The lifecycle of your chain is highly dependent on
chain care, that is, cleaning and lubrication.
Perform a basic cleaning of your chain using a cloth.
Apply chain oil evenly to the chain while rotating the
crank. Turn the crank a few more revolutions to evenly
distribute the chain oil and let the chain sit for several
minutes to allow the oil to soak into the chain. Rub off
any leftover lubricant with a clean cloth.
The location of the brake levers may vary depending
on the model and manufacturer. Read the enclosed
owner’s manual from the derailleur manufacturer.
Gear hubs may require shifting without a load or the
cyclist to stop pedalling when shifting. Make sure that
shifting is noiseless. Read the enclosed owner’s manual
from the derailleur manufacturer.
Lubricants enter the environment when cycling.
To protect the environment, only use biodegradable
lubricants. Make sure you use a base that collects any
dripping oil.
Failure to remain alert on public roads.
Practicing
braking on public roads may distract one’s attention
from traffic developments, pose potential risks and
cause an accident or crash. Only practice shifting
when on a surface away from traffic.
Reduced braking effectiveness.
Lubricants on
brake pads and brake discs reduce their friction
coefficient and consequently the braking effective-
ness. Make sure that no lubricants come into contact
with the brakes.
Observe the owner’s manual of the gear hub
manufacturer when adjusting the gear hub.
!
WARNING
!
WARNING
INFORMATION
WARNING
INFORMATION
INFORMATION
INFORMATION
Crank play.
Crank play may indicate damage to the
seats of the crankset. There is a risk of the crank arms
fracturing. It may be necessary to tighten the crank
arms. If tightening the crank arms does not resolve the
problem, contact a bike specialist or the Porsche Bike
hotline.
Derailleur
