- Pag. 2. -
2. Rear suspension.
2-1. NRS
TM
rear suspension system.
NRS
TM
(No Resonance System) bikes are equipped with dedicated RockShox SID rear shocks.
These SID shocks have separated “positive” air chambers (spring) and “negative” air chambers
(spring). The positive springs’ main function is to absorb the shock impact.
The negative spring (which is much smaller) makes the positive spring function smoothly and prevents
a harsh top out feeling when the shock returns to its original position.
Both air chambers have a valve to change the air pressure with a shock pump. By independently
inflating both chambers the NRS
TM
system can be set up in such a way that maximum efficiency,
comfort and control easily can be obtained. Note: the NRS
TM
system should not be set up with a
negative air pressure which is almost as high as the positive air pressure. Doing so, the “zero-SAG”
setting cannot be achieved.
Bikes with NRS
TM
system come with a shock pump with gauge free of charge!
Please use this pump to inflate the rear shock!
Air pressures have to be checked before every ride, slight air loss might occur over a few days
standing.
The drawing below shows the rear shock, air damping type (SID made by RockShox, special version
for Giant travel bikes).
The rear shocks are serviceable and must be returned for service, only to an authorised RockShox
dealer (or call the RockShox distributor in your country) once a year or more often if the bike is used in
extreme conditions.
This service is not necessarily free of charge!
ALL SERVICE AND MAINTENANCE OF THE REAR SHOCKS SHOULD ONLY BE
PERFORMED WITH PROPER TOOLS BY AN AUTHORISED ROCKSHOX DEALER
OR BY THE ROCKSHOX DISTRIBUTOR IN YOUR COUNTRY.
Figure 2.
A. Negative air valve
B. Positive (compression) air valve
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