2
The seat, the part you sit on when riding a bike, is held in place by the
seatpost (Figure 2). The seatpost binder secures the seatpost in the frame.
Proper adjustment of each component is important for your comfort and
pedaling efficiency. This section explains how to inspect, adjust, and lubricate your
seatpost.
Inspect your seatpost regularly
Every month
inspect the seatpost quick-release lever, or
seat post binder bolt, and seat fixing bolt (Figure 2) for proper
tightness. Make sure the seat is secure by attempting to turn the
seat and seatpost in the frame, and attempt to move the front of
the seat up and down. If the seat rotates, is loose, or moves up
and down, tighten the binder bolt or quick-release, or seat fixing
bolt, and repeat the test. Never engage the seatpost binder with
the seatpost out of the frame.
Tighten the following bolts:
• Seat post binder (Figure 2): 85-125 lb•in (9.6-14.1 Nm),
or 65-80 lb•in (7.3-9 Nm) for a carbon fiber seatpost.
• Seat fixing bolt: 100-150 lb•in (11.3-17.0 Nm).
For a seatpost binder using a quick-release lever, the mechanism
works the same as a wheel quick-release. Adjust the lever tension,
and make sure it is in the
CLOSED
position.
Inspecting a carbon fiber seatpost
Unlike metal parts, carbon composite parts that have been damaged may not
bend, bulge or deform; a damaged part may appear to be normal to a cursory
glance. After any high force load, like a crash, or other impact to your bicycle,
thoroughly inspect your carbon composite seatpost:
• Check for scratches, gouges, or other surface problems.
• Check the part for loss of rigidity.
• Check the part for delamination.
If the part has any problems, do not ride the bike. Take the bike to your dealer
for replacement or further inspection.
Figure 2- Seatpost parts
Figure 2- Seatpost parts
WARNING
A damaged carbon fiber part can fail suddenly, causing
A damaged carbon fiber part can fail suddenly, causing
serious injury or death. Inspect a carbon fiber part for
serious injury or death. Inspect a carbon fiber part for
damage frequently. If you suspect a carbon fiber part is
damage frequently. If you suspect a carbon fiber part is
damaged, replace the part before riding, or take the bike to
damaged, replace the part before riding, or take the bike to
your dealer for service.
your dealer for service.
