Setting Sag - SRAM RockShox PIKE Manuel De L'utilisateur

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perForManCe tUning
RockShox forks can be tuned for your particular weight, riding style and terrain.

setting sag

RockShox forks are designed to sag when you are sitting on your bike. Sag is the compression of the fork
caused by the rider's weight. Proper sag allows the front wheel to follow the contour of the terrain as you ride.
To measure sag, set the fork to maximum travel. Install a zip tie on the upper tube of the fork flush against the
wiper seal. Sit on the bike with normal riding apparel. Step off the bike, and measure the distance between
the wiper seal and the zip tie. This is your sag. The sag should be between 5 and 25 percent of maximum
travel. If you're unable to achieve optimum sag you may need to change the fork's air pressure or spring.
Use the tuning information below to assist in proper set up of your fork.
air spring tUning
dUal air (piKe, reba, revelation)
With independently adjustable positive (top) and negative (bottom) air chambers, the air spring system of
your fork can be easily tuned for your weight and riding style. Use the following instructions as a starting
point. If further fine tuning is desired, follow the hints at the end of this section.
step 1 - selecting positive air pressure
Positive air pressure determines the amount of force required to compress your fork. More positive air
pressure will result in less suspension sag and higher bottom out forces. Less positive air pressure will
result in more suspension sag and lower bottom out forces.
Using the chart below as a guideline, inflate the positive air chamber to the desired pressure.
note: Air U-Turn pressure should be set at maximum travel.
(reba/pike/revelation)
rider weight dual air
< 40 (63kg) 70 - 90 psi
40 - 60 (63 - 72kg) 90 - 05 psi
60 - 80 (72 - 8kg) 05 - 20 psi
80 - 200 (8 - 90kg) 20 - 35 psi
>220 (99kg) 50 psi
step 2 - selecting negative air pressure
Negative air pressure effects the amount of force required to initiate suspension travel. Negative air
pressure works with bump input AGAINST the force of the positive air chamber. More negative air pressure
results in a suspension set-up that is more active, especially to small bump input. Less negative air
pressure results in a suspension set-up that does not move or "bob" under rider input or small bumps. Start
with the negative air pressure equal to the positive air pressure and then increase or decrease it as desired.
solo air (argyle)
The positive and negative air chambers with these forks fill simultaneously from a single valve. The air
spring is designed so the pressure in the two separate chambers equalizes as air is added, simplifying
setup and providing a balanced ride.
note: When adding air to the fork, a user may see a sudden drop in the air pressure reading on their shock
pump. This is normal and indicates that the negative air chamber has opened and the pressure between the
chambers has equalized. The user should continue to add air to the fork until the predetermined pressure is met.
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Pike, Reba, Revelation, Domain & Argyle User Manual
(reba/pike/revelation)
air u-turn
90 - 5 psi
5 - 30 psi
30 - 45 psi
45 - 60 psi
75 psi
95-405-000-000, Rev. A
Pike, Reba, Revelation, Domain & Argyle User Manual
setting solo air:
Remove the air cap on the air valve located on the rider's left side of the fork crown by turning counterclockwise.
Using the air chart below as a guideline, inflate the air chambers to the desired pressure.
(argyle)
solo air
rider weight
< 40 (63kg) 20 - 35 psi
40 - 60 (63 - 72kg) 35 - 50 psi
60 - 80 (72 - 8kg) 50 - 65 psi
80 - 200 (8 - 90kg) 65 - 80 psi
> 220 (99kg) +
80 psi
Do not exceed 220 psi.
Coil spring tUning
changing the spring rate
Spring rate is the amount of force needed to compress a spring one inch. Changing your fork's coil spring
for a spring of a higher or lower rate will alter the overall feel of your fork. Higher spring rates make the fork
feel more "stiff", while lower spring rates make the fork more "supple". Contact your local RockShox dealer
to order replacement springs.
note: When decreasing travel (see "U-Turn travel adjust"), you increase the spring rate.
travel adjUstMents
important: Stop turning the U-turn adjuster knob after you've reached maximum travel. Turning the knob
past this point may cause damage to the U-turn feature.
note: Ensure the fork is compressed once after sitting for more than a day and in "Open" position
before travel adjustment.
coil u-turn travel adjust (domain, pike, revelation)
U-Turn forks offer 45mm of travel adjustment. To determine the travel on your fork, use the travel gradients
on the upper tube (except Domain).
Turning the U-turn adjuster knob counterclockwise increases travel. Each turn increases or decreases
the travel by 7.5mm.
air u-turn travel adjust (pike, revelation, reba)
To change the travel of your fork, turn the Air U-Turn knob (top left knob on fork). Clockwise rotation
reduces the travel of the fork. Counterclockwise rotation increases the travel of the fork. The new travel
setting can be seen by looking at the travel marking that remains exposed on the left upper tube when not
sitting on the bike. The reduced travel setting will have slightly lower bottom out force, therefore additional
compression damping may be desired.
changing travel (argyle, reba)
To change the travel of your fork you must perform a full service on your fork. To obtain service
information or instructions, visit our website at www.rockshox.com or contact your local RockShox
dealer or distributor.
© SRAM Corporation • May 2006
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