Suspension; Rigid Fork; Suspension Fork - Bosch ZEMO SU-E FS 12 Translation Of Original Operating Instructions

3.3.3

Suspension

Both forks and suspension forks are fitted in this
model series.

3.3.3.1 Rigid fork

Rigid forks do not feature suspension. They transfer
the used muscle and motor power to the road to
optimum effect. Pedelecs with rigid forks consume
less energy on steep roads and have a greater range
than pedelecs with suspension.

3.3.3.2 Suspension fork

A fork deflects when a steel spring, air suspension,
or both suspension types act on it.
Unlike rigid forks, suspension forks improve contact
with the ground and thus enhance comfort using two
functions: suspension and damping. The suspension
in a pedelec prevents an impact, such as one caused
by a stone lying in the pedelec's path, from being
channelled directly into the body via the fork. The
impact is absorbed by the suspension system
instead. This causes the suspension fork to
compress.
After compressing, the suspension fork returns to
its original position. If the bike has a damper, the
damper will slow this movement down. It thus
prevents the suspension system from springing
back in an uncontrolled manner and the fork from
oscillating. Dampers which dampen compressive
deflection movements, i.e. a compression load,
are called compression dampers or compression
dashpots.
MY22Z01 - 12_1.0_25.07.2022
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Figure 8: Without suspension (1) and with suspension (2)
Dampers which dampen rebound deflection
movements, i.e. a rebound load, are called
rebound dampers or dashpots.
The compression can be disabled in suspension
forks. A suspension fork will then behave like a rigid
fork.
The stem and the handlebars are fastened to the
fork steerer. The wheel is fastened to the axle.
Description
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