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Operation
6.3.7 Setting the Suntour rear frame
damper
Only applies to pedelecs with this equipment
6.3.7.1 Adjusting the negative deflection
Notice
If the air pressure in the rear frame damper is
exceeded or undershot, the damper can be
permanently damaged.
Do not exceed the maximum air pressure of
300 psi (20 bar).
Negative deflection (sag) is compression of the rear
frame damper caused by the weight of the rider and
their gear (e.g. a backpack), the sitting position and
the frame geometry. This sag is not caused by riding.
Each rider has a different weight and sitting position.
The sag depends on the rider's position and weight
and should be between 25% and 30% of the
maximum Rear frame damper, depending on
pedelec usage and preferences.
Set the compression adjuster to the OPEN
position so that the sag setting is not affected.
Remove the cap on the air valve.
Attach a high-pressure damper pump to the
valve.
Adjust the air pressure of the damper so that it
corresponds to your weight.
Remove the high-pressure pump.
Measure the distance between the rubber air
chamber seal and the end of the damper. This
distance is the "total damper deflection".
Put on your usual bicycling clothing, including
luggage. Sit on the pedelec in your usual riding
position and support yourself against an object
such as a wall or tree.
Push the O-ring downward against the rubber air
chamber seal.
Get off the pedelec without allowing it to deflect.
Measure the distance between the rubber air
chamber seal and the O-ring. This dimension is
the sag. The recommended sag value is between
15% (hard) and 25% (soft) of the "total damper
deflection."
Increase or reduce the air pressure until you have
reached the desired sag.
6.3.7.2 Adjusting the rebound
The rebound defines the speed at which the rear
frame damper rebounds after being loaded. The
rebound setting depends on the air pressure setting.
Higher sag settings require lower rebound settings.
1
Figure 61: Suntour rebound adjuster wheel (1) on the rear
frame damper
Turn the rebound adjuster wheel in the
– direction to increase rebounding.
Turn the rebound adjuster wheel in the
+ direction to reduce compressive deflection
movements.
6.3.7.3 Setting the compression
The compression damper setting of the rear frame
damper makes it possible to set the damper
according to the conditions of the ground. The
compression damper setting specifies the speed at
which the rear frame damper deflects after being
loaded.
Figure 62: Suntour compression adjuster on the rear frame
damper
1
Turn the compression adjuster towards the
– symbol to increase rebounding.
Turn the compression adjuster towards the
+ symbol to reduce compressive deflection
movement.
MY20H01-42_1.0_21.06.2019 60
61


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