51
RIM RUNOUT AND SPOKE TENSION
The spokes connect the rim with the hub in
the center of the wheel. The uniform spoke
tension is responsible for maintaining the
concentricity of the wheel. When a spoke
breaks when running over a severe bump,
the tension of the spokes is no longer in
equilibrium. Even before the rider notices the
malfunction it is aecting your bike. The side
walls of the rims no longer run parallel to
the braking surface so braking eectiveness
cannot be ensured.
Be sure to check the concentricity (runout)
from time to time. Lift the wheel from the
ground and spin it with your hand. Watch the
gap between the rim and brake pad. If this
gap changes by more than one millimeter it
needs to be trued by a professional.
TIP!
The truing of wheels is dicult
work and is best left to your dealer!
TIP!
Please read more on rim wear
indicators at page 34.
Do not ride with wheels that are
out of true. If the rim is severely
out of true then the brake pad
can miss the rim sidewall and
actually strike the spokes leading
to an accident.
DANGER!
Check the rims for wear and
defects on a regular base. Worn
out rims are more delicate for
defects. V-brakes cause more
wear. A deformed or broken rim
may lead to heavy accidents.
DANGER!
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