S -
44
| English
English |
S -
45
Danger:
Damaged cables should
be replaced immediately,
as they can snap. Risk of
accident!
Danger:
Repeated readjustment
at the brake lever or at
the cable on the brake
calliper can drastically
reduce the maximum
braking performance.
Mechanical Disc Brakes
Functional Check
The more brake pads of mechanical disc brakes wear down, the longer is the
brake lever travel. Regularly check that the brake reaches a defined pressure point
before the lever touches the handlebar. Make sure that the brake cables are in
sound condition!
Wear and Maintenance
To a certain extent, wear of the brake pads can be compensated directly at
the brake calliper.
With the disc brake
TRP Spyr
you have two options to adjust the brake calliper
and the lever travel:
1. Release the fixing bolt a little to compensate for the brake pad wear.
2. Tighten the fixing bolt for the brake pads clockwise by using a 3-mm Allen key
to account for brake pad wear until you get the desired lever travel. Keep in
mind that there is one pad adjusting bolt on both pistons respectively.
After readjusting check the functioning and Make sure that the brake pads do
not drag when releasing the brake lever and spinning the wheel.
Repeated readjustment at the brake lever makes the arm on the brake calliper
change its position. This can reduce the braking effect and result in a complete
brake failure in an extreme case. Risk of accident!
Some models offer further ways of adjusting the brakes directly at the brake
calliper, though this requires a certain amount of skill. In any case, be sure to read
the original instructions of the brake manufacturer before adjusting the brakes. If
you are in doubt or if you have any questions, contact your STEVENS dealer.
Note:
Some systems must be readjusted directly at the brake calliper to compen-
sate wear. For more information read the enclosed instructions of the brake
manufacturer.
Note:
The manufacturers of mechanical disc brakes usually deliver their
products with detailed instructions. Be sure to read them carefully before
removing a wheel or doing any maintenance work.
The Gears
The gears of the STEVENS bicycle serve to adjust the gear ratio to the terrain
you are riding on and the desired speed. The gears do not reduce the physi-
cal work to be performed which remains the same with the identical distance to
be performed at identical speed, but the pedalling force per crank rotation. That
means: A low gear (where in the case of derailleur gears the chain runs on the
small chainring and a large sprocket) allows you to climb steep hills with moderate
pedalling force. You must, however, pedal relatively fast.
High gears (large chainring, small sprocket) are for riding downhill. Every turn
of the pedals takes you many metres forward at correspondingly high speed.
To ride economically you frequently have to shift gears. As with a motor vehicle,
your "engine” wants to be kept within a certain speed range, if it is to give its best
performance. On level ground your pedalling speed, also referred to as cadence,
should be higher than 60 strokes a minute. On flat terrain road racers pedal
between 90 and 110 revolutions per minute. When climbing uphill, the cadence
will naturally drops somewhat. Your pedalling should, however, always remain fluid.
Finely graduated adjustments as well as an easy operability of modern bike
gears are the best preconditions for an efficient riding. In addition, it reduces chain
and sprocket wear as well as the strain on your knee joints.
Derailleur Gears
Derailleur gears are currently the most effective type of power transmission on
bicycles. About 97 to 98 percent of the pedalling force performed is transmitted to
the rear wheel with well-maintained and greased derailleur gears.
With specially designed sprocket teeth, flexible chains and clear-cut lever posi-
tions, shifting gears has become very easy. Most systems have an indicator on the
handlebar showing the currently used gear.
The bottom bracket is the interface between cranks and frame. There are dif-
ferent designs, in some cases the bearing shaft is part of the bottom bracket, in
some other cases it is integrated into the right crank. Sealed bottom brackets are
maintenance free and delivered without play ex works. The bottom bracket in the
frame and the cranks on the shaft must be checked for play at regular intervals.
Also check at regular intervals whether the cranks are firmly attached to the
bearing shaft or whether there is play. Grab the crank and try to jiggle it forcefully.
It must be absolutely free of play. If you notice any play, contact your STEVENS
dealer immediately.
Caution:
Be sure to always wear
straight cut trousers or
use trouser clips or the
like to Make sure that
your trousers do not
get caught in the chain
or the chainrings thus
provoking a fall.
