31 BEN-E-BIKE INSTRUCTION MANUAL
AMPERUM GmbH
Stuttgarter Str. 72
D-78628 Rottweil
www.ben-e-bike.net
[email protected]
ADJUSTMENT OF THE SUSPENSION FORK
If your BEN-E-BIKE is not equipped with a rigid but an air suspension fork, the stiffness of the fork can be adapted
to the driver's weight by changing the air pressure in the air chamber of the left fork leg.
If you want to change the spring stiffness of the suspension fork, you need a so-called "damper pump". If you
do not have such a pump, contact your dealer for help. Never use an ordinary tire pump or even a compressor
to pump up the suspension fork. Irreparable damage to the seals is pre-programmed in this case!
Please note that the fork should be already compressed slightly when sitting on the BEN-E-BIKE - this is the so-
called negative spring travel ("SAG"). If the air pressure is too high, you sacrifice a lot of riding comfort as the front
wheel loses contact to the ground more quickly. Useful is a negative spring travel of about 15 - 20%, which in the
case of the "SMOOTHER" fork means a compression of about 15 - 20mm.
For convenience the fork has a rubber ring on the left stanchion tube to facilitate the proper adjustment of the air
pressure:
•
Push the rubber ring all the way down and place the BEN-E-BIKE in the unloaded state vertically.
•
Now lift your child onto the saddle so that it does not touch the ground with the feet, but instead loads the
BEN-E-BIKE with all its weight, thereby compressing the suspension fork.
•
If the air pressure in the fork is correct, it should be compressed by about 15 mm.
