REAR SHOCK INSTALLATION
WARNING
Rear shock setup and configuration varies greatly between different bicycle manufacturers. Be sure to
refer to the owner's manual for your bicycle. FOX products should be installed by a qualified bicycle
service technician, in accordance with FOX installation specifications. Improperly installed shocks can fail,
causing the rider to lose control, resulting in SERIOUS INJURY OR DEATH.
If you are installing your shock on a bike for which the shock was not original equipment, follow the steps
below to ensure proper clearance before riding.
AIR SHOCKS
1. Install the shock onto your frame according to your frame manufacturer's instructions.
2. Remove the air cap, attach a shock pump, then SLOWLY release all air out of the main air chamber.
3. Slowly compress the suspension through its entire travel.
4. Check that the shock does NOT contact any portion of your frame or linkage as it cycles through
its travel.
5. Set the sag according to instructions online at www.ridefox.com.
WARNING
Do not use more than the FOX Factory specified quantity of volume spacers
for your shock absorber.
Do not exceed maximum air pressure:
EVOL air shocks have a maximum air pressure of 350 psi.
Minimum air pressure is:
50 psi for all air shocks.
Pressure measured at an ambient temperature of 70-75˚F. Normal operating
temperature range for FOX products is 20-140˚F.
EVOL AIR SLEEVE
ADDING AIR PRESSURE
Equalize the positive and negative air chambers by slowly compressing the shock through 25% of its travel
10-20 times after every 50 psi addition.
Failure to equalize the chambers can result in greater pressure in the positive air chamber than the
negative chamber. If the shock feels very stiff and is in the topout position, compress the shock until you
hear or feel air transfer. Hold the shock in this compressed position for a few seconds.
RELEASING AIR PRESSURE
Release air slowly so the air from the negative chamber can also be released through the Schrader valve.
Releasing the air pressure too quickly can cause the negative chamber to have more pressure than the
positive chamber. If the shock is compressed into its travel and does not fully extend, add air pressure
until the shock extends, then slowly compress the shock through 25% of its travel 10-20 times.
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