Page 56 - Urban Jungle mode d'emploi_EN_HD

Note in general that the suspension fork must give in a little even when you are just sitting on the bike (c) – this is the so-called negative suspension travel or sag. When the front wheel passes through a depression in the ground, the spring extends and the suspension fork will smooth out the uneven surface. If the air pressure or the spring preload is too high, this effect is lost because thesuspension fork is already fully extended. This means that an important comfort and safety factor is lost if the tyre briefly loses contact with the ground.
The suspension fork should yield by 10-20 % of the maximum suspension travel.
To measure the travel you can use the rubber ring (d) mainly located on the thinner, plunging tube of the suspension fork. If there is no rubber ring, tie up a cable tie around one of the stanchion tubes. Make sure it is not too tight, you should still be able to move it, it should however not slip by itself.
Put on your usual riding clothing (including if necessary a packed rucksack), sit on your bike and bring yourself into the usual riding position. Lean against a fixed object (railings, wall etc.) and make sure you do not fall over. Ask a helper to move the rubber ring or the cable tie downwards against the dust seal at the lower leg.
Get off your URBAN JUNGLE bike so that the fork does not compress any more. The distance between the rubber ring/cable tie and the wiper is the negative suspension travel, or sag (e). Compare it with the total suspension travel (as specified by the manufacturer) to determine whether the suspension should be set to be harder or softer.
With pneumatic suspension forks the spring rate is set by the air pressure in the fork. The pressure must be set before the first ride by means of a special high-pressure pump with pressure gauge (f) and modified later as required due to changes in the weight of the rider and/or load.
Note the appropriate setting values and check them subsequently at regular intervals. Always follow the recommendations of the manufacturer and never exceed the maximum air pressure for the suspension fork. Always make a test ride after each change to the settings.
d
e
f
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