Setting The Suntour Rear Frame Damper; Adjusting The Negative Deflection; Adjusting The Rebound - Bosch KETTLER KB064-ZAFD Series Translation Of The Original Operating Instructions

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.
MY20K01-12_1.0_12.06.2019
 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.
Figure 64: Suntour rebound adjuster wheel (1) on the rear
frame damper
 Turn the rebound adjuster wheel towards the
– symbol to increase rebounding.
 Turn the rebound adjuster wheel towards the
+ symbol to reduce compressive deflection
movement.
Operation
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