Bosch ZEMO SU-E FS 12 Translation Of Original Operating Instructions page 200

9.1.7 Knee pain
Pedelec riding is a sport that is easy on the knee
joints and is recommended for beginners. Very
powerful forces are transmitted from the thigh to
the foot via the knee when pedalling. As a result,
the tendons and cartilage in the knee are
subjected to great stress.
Pain on the inside and outside of the knee is often
caused by incorrect adjustment of the click system
and the foot being out of position as a
consequence. Pain in the lower part of the knee
usually stems from an improper riding position
Cold weather can also cause knee pain. Tendons
are less elastic at low temperatures and thus rub
against the knee more.
If the knee is out of position, the cartilage
becomes very worn. Ligaments that are too short
or muscular imbalances can increase this effect.
Pain on the top of the kneecap often indicates a
muscular imbalance. Pain under the kneecap is
usually related to excessive pressure in the knee
joint and consequential irritation to the patellar
tendon
9.1.8 Pain in the foot
Your feet are one of three points of contact when
you ride a pedelec. Feet transmit force from the
upper thigh to the pedal, thus driving the pedelec.
In the process, your feet are subjected to between
100% and, during jumps, even up to 1,000% of
your body weight
Foot pain often arises when the saddle is too low
or the foot is placed incorrectly on the pedal.
Unsuitable shoes can also be the cause of pain in
the feet.
MY22Z01 - 12_1.0_25.07.2022
Troubleshooting, fault clearance and repair
Solution
• Contact specialist dealer. Have the
pedelec adjusted (see Section 6.5). Then
measure the wheel.
• Avoid cold.
• Get imbalances under control through
stretching exercises, strengthening the
muscles and Blackroll training.
Solution
• Wear sturdy shoes which are not too
tightly laced. (see Section 2.5)
• Position feet correctly on the pedals (see
Section 6.13).
• Adjust the saddle height to an optimum
position (see Section 6.5.4).
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