100
101
Adjustment
As mentioned in Part 2, the seat can be adjusted in height, angle and distance from the handlebars to suit the
individual rider.
Seat angle is a matter of personal preference but the most comfortable position will usually be found when the top of the seat
is almost parallel to the ground, or slightly raised at the front.
The seat can also be adjusted by sliding it forward or back along the mounting rails to obtain the most comfortable reach to the
handlebars.
When fitting, position the seat post into the clamp under the seat and place it in the frame without tightening. Adjust it to the
desired angle and position and tighten the clamping mechanism.
There are two types of seat clamps commonly in use. The most common employs a steel clamp with hexagonal nuts on either
side to tighten. The other type, known as a micro-adjustable clamp, uses a single vertically mounted Allen head fixing bolt to
tighten. After fixing the seat to the desired position on the post, adjust the height to the required level and tighten the binder
bolt.
Note that the type of binder bolt may be either a hexagonal bolt, an Allen head bolt or a quick release mechanism. The
operation of a seat post quick release mechanism is the same as for quick release hubs. (Refer to pages 66-67)
Test the security by grasping the seat and trying to turn it sideways. If it moves, you will need to further tighten the binder bolt.
Note: Remember that the minimum insertion mark must remain inside the frame assembly.
DRIVETRAIN
The drivetrain of a bicycle refers to all parts that transmit power to
the rear wheel including the pedals, chain, chainwheel, crank set and
freewheel.
PEDALS
Pedals are available in a variety of shapes, sizes and materials, and
each are designed with a particular purpose in mind. Some pedals
can be fitted with toe clips and straps. These help to keep the feet
correctly positioned and allow the rider to exert pulling force, as well as
downward pressure, on the pedals. Use of toe clips with straps requires
practice to acquire the necessary skill to operate them safely.
Inspection
Pedals should be inspected every month, taking note of the following
areas:
• Check correct tightness into the crank arms. If pedals are
allowed to become loose, they will not only be dangerous but will
also cause irreparable damage to the cranks.
• Check that pedal bearings are properly adjusted. Move the
pedals up and down, and right to left, and also rotate them by
hand. If you detect any looseness or roughness in the pedal
bearings then adjustment, lubrication or replacement is required.
• Ensure that the front and rear pedal reflectors are clean and
securely fitted.
• Also ensure that the toe clips, if fitted, are securely tightened to
the pedals.
L = Left
Turn counter-clockwise
to tighten.
R = Right
Turn clockwise
to tighten.
Never ride with loose pedals.
!