MY20B01-32_1.0_21.06.2019
59
Operation
6.3.5.2 Adjusting the air suspension fork
negative deflection
Only applies to pedelecs with this equipment
The air valve is located under a cover on the
head of the left shock absorber. Screw off the
cover.
Figure 57: Screw caps in different designs
Screw a high-pressure pump onto the valve.
Pump the suspension fork up to the desired
pressure. Never exceed the recommended
maximum air pressure. Comply with the values
of the filling pressure table.
Remove the high-pressure pump.
.
Measure the distance between the crown and
the dust wiper of the fork. This distance is the
total deflection of the fork.
Push a temporarily attached cable tie
downward against the dust wiper of the fork.
Put on your usual bicycling clothing, including
luggage.
Sit on the pedelec in your usual riding position
and support yourself (e.g. against a wall or
tree).
Get off the pedelec without allowing it to
deflect.
Measure the distance between the dust wiper
and the cable tie. This dimension is the sag.
The sag value should be between 15% (hard)
and 30% (soft) of the total fork deflection.
Increase or reduce the air pressure until you
have reached the desired sag.
Once the sag is correct, re-tighten the blue air
cover cap clockwise.
If you cannot achieve the desired sag, you may
need to make an internal adjustment. For this
purpose, contact your specialist dealer.
6.3.5.3 Adjusting the steel suspension fork
negative deflection
Only applies to pedelecs with this equipment
You can adjust the fork by tensioning the spring to
the rider's weight and their preferred riding style.
It is not the coil spring hardness which is adjusted;
it is its pre-tensioning. This reduces the fork's
negative deflection when the rider sits on the
pedelec.
Figure 58: Negative deflection setting wheel on the
suspension fork crown
The setting wheel may be located under a
plastic cover on the suspension fork crown.
Remove the plastic cover by pulling it off
upwards.
Turn the negative deflection setting wheel in a
clockwise direction to increase the spring pre-
tensioning. Turn the negative deflection setting
wheel in an anti-clockwise direction to reduce
it.
Rider weight AION, NEX XCR 32, XCR 34
< 55 kg 35 - 50 psi 40 - 55 psi
55 - 65 kg 50 - 60 psi 55 - 65 psi
65 - 75 g 60 - 70 psi 65 - 75 psi
75 - 85 kg 70 - 85 psi 75 - 85 psi
85 - 95 kg 85 - 100 psi 85 - 95 psi
< 100 kg + 105 psi + 100 psi
Max. pressure 150 psi 180 psi
Table 52: Filling pressure table for Suntour air forks
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