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3.5.2.2 Rear frame damper
A rear frame damper is primarily fitted to mountain
bikes and helps to protect the pedelec and rider
against impacts and vibrations caused by uneven
ground.
Rear frame damper suspension
A rear frame damper deflects when a steel spring,
air suspension, or both suspension types act on it.
Negative deflection (sag)
Sag is the percentage of the entire spring
deflection that is compressed by the rider's body
weight, including equipment (such as a
backpack), their seating position and frame
geometry. Sag is not caused by riding.
The rear frame damper rebounds at a controlled
speed if it is optimally adjusted. The rear wheel
does not bounce off rough surfaces or the ground;
Figure 7: Optimum rear frame damper ride performance
Lock
Compression can be disabled in all rear frame
dampers using the lockout. The frame will then
behave in the same way as one without a rear
frame damper.
The suspension system absorbs a great deal of
motor and muscle power during rides uphill or on
optimally tarmacked roads. This increases energy
consumption and reduces propulsion. That is why
it is a good idea to disable the suspension.
MY24K12 - 13_1.0_01.02.2024
it stays in contact with the ground instead
(blue line).
The saddle is raised slightly if the bump is
compensated and gently sinks downwards when
the suspension deflects as soon as the wheel
touches the ground after the bump. The rear
frame damper rebounds in a controlled way, so
that the rider remains sitting in a horizontal
position when the next bump is absorbed. The
suspension motion is predictable and controlled.
The rider is not thrown upwards or forwards
(green line).
Threshold
The threshold is an optimal lockout mode.
If a threshold is set, the rear frame damper behaves
as if it were locked out. The threshold prevents
deflection until a medium impact or downward force
occurs.
Description
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