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REAR SHOCK SETUP
NOTE: This air chart is designed as a
recommended starting point only. Please
refer to your shock owner’s manual for
additonal setup information.
Rear Air Shock Setup
AFR Brain Fade
Sag Setting: Set the sag at 22 to 28% of
shock stroke.
10-12mm for 26” FSR
8.5-11mm for 29er FSR.
See attached chart for starting air pressure.
Note - the chart is only a starting point,
actual sag needs to the checked and
adjusted on the bike, while riding, and at
regular intervals.
Turn Brain Fade knob counter-clockwise
(1 to 1.5 turns from full firm) to allow
shock to sag more easily. After setting the
pressure, push the rubber ring up to the
seal, sit on the bike gently, dismount, and measure sag.
AFR Brain Fade Compression setting: After the sag is set, adjust the Brain Fade to full
firm or rider preference.
AFR Brain Fade ride tips: Stumpjumper Brain Fade controls the Trail Tune inertia valve
damping. The blue knob adjusts Trail Tune damping from firm (clockwise) to soft
(counterclockwise) and does NOT completely lock out the shock (ie. Epic).
Backing off from full firm can help with tracking in loose terrain conditions while riding
off camber sections or climbing. The soft setting can also help during lengthy downhill
or rugged conditions where the rider may want the suspension active at all times.
Rebound setting: Set rebound damping adjuster to rider preference. A good starting
point is 9 clicks out from full firm. Typically a slower rebound for slow speed, bigger
hits to eliminate kickback, or faster rebound for higher speeds and smaller hits, so the
suspension does not pack up and has time to rebound between bumps.
AFR SJ BRAIN FADE
Fig.1
Brain Fade
Inertia Valve
S
O
F
T
E
R
F
I
R
M
E
R
AFR AIR CHART
Rider Weight
lbs
90-100
100-110
110-120
120-130
130-140
140-150
150-160
160-170
170-180
180-190
190-200
200-210
210-220
220-230
230-240
240-250
250-265
265-280
280-295
(kg)
(41-45)
(45-50)
(50-54)
(54-60)
(60-64)
(64-68)
(68-73)
(73-77)
(77-82)
(82-86)
(86-91)
(91-95)
(95-100)
(100-104)
(104-109)
(109-113)
(113-120)
(120-127)
(127-134)
Air PSI
75-80
80-90
90-100
100-110
110-120
120-130
130-145
145-160
160-175
175-190
190-205
205-220
220-235
235-250
250-265
265-280
280-295
295-310
310-325
26” FSR
Air PSI
75-80
80-90
90-100
100-110
110-120
120-135
135-145
145-160
160-170
170-185
185-195
195-210
210-220
220-230
230-245
245-260
260-275
275-290
290-305
29er FSR