Installing Your Shock  |  General Maintenance  |  Before You Ride  |  Measuring Sag  |  Setting Sag  |  Adjusting Rebound  |  Adjusting BrainFade  |  Service Intervals  |  Important Safety Information  |  Stuck Down Shock  |  Air Sleeve Maintenance



0.47 lbs./213 g
(6.50" x 1.50" No reducers)


high volume standard air sleeve, lightweight chassis, DOHC ProPedal Technology that provides pedaling efficiency as well as control and sensitivity for big and small hits. with 2 positions, ProPedal adjust with 3 FIRM positions, air spring pressure, rebound adjust



intended use

freeride A style of riding that is defined by short course technical acrobatics and athletes that defy gravity. Generally, the bikes and components required for freeriding are stronger and heavier than their lightweight cross-country brethren. Combine the aerial pyrotechnics of freeriding with some longer trails and courses, as is typical of cross-country riding, and now you're looking at all-mountain riding., all-mountain A style of bicycle riding that melds the stamina and conditioning required of cross-country with the technical abilities of freeriding., cross-country A style of bicycle riding that is defined by long rides, lightweight bicycles and stamina.

Installing Your Shock

If you are installing your shock on a bike in which the shock is not original equipment:

  1. Install the shock.

  2. Remove the main air chamber air cap and let all the air out of the main air chamber.

  3. Carefully cycle the suspension through its entire travel The total amount the shock or fork compresses. On a shock it is measured using the eye-to-eye distance or shaft travel..

  4. Check that all parts of the shock are clear of the frame and swingarm as it cycles through the travel.

  5. Pressurize your main air chamber to a minimum of 50 psi and no more than 300 psi. You will tune to a more specific air pressure in the Setting Sag section below.

  6. Set sag.

General Maintenance

There may be a small amount of air sleeve lubricant residue on the body. This is normal. If this residual air sleeve lubricant is not present, this is an indication that the air sleeve should be re-lubricated. Some other things to consider for all shock models:

Before You Ride

  1. Clean the outside of your shock with soap and water and wipe dry with a soft dry rag. Do not use a high pressure washer on your shock.

  2. Inspect entire exterior of shock for damage. The shock should not be used if any of the exterior parts appear to be damaged. Please contact your local dealer or FOX Racing Shox for further inspection and repair.

  3. Check that quick-release levers (or thru-axle pinch bolts) are properly adjusted and tightened.

  4. Check headset adjustment. Adjust headset if loose, according to manufacturer’s recommendations.

  5. Check that brake cables or hoses are properly fastened.

  6. Check that the front and rear brakes operate properly on flat land.

Setting Sag

BRAIN Technology senses bumps in the trail and activates the suspension giving the rider the efficiency of a hardtail with all the benefits of a full suspension bicycle.

To optimize the performance of a BRAIN shock, it is important to set it up correctly. Tuning the spring rate Force required to compress a spring one inch. (air pressure) and rebound damping Oil or air damping resistance that controls the rate at which the shock or fork extends after being compressed. (rate at which the shock returns) will greatly enhance the riding experience.

The method for setting sag on a BRAIN-equipped bicycle is slightly different than that used for traditional shocks:

  1. Slide the travel indicator o-ring to the scraper lip.

  2. Sit on the bicycle in a normal riding position. It is best to wear normal riding gear, and remain steady and still in this position for ten (10) seconds. This will allow the shock to “sit” into its travel.

  3. Dismount the bicycle and measure the distance between the scraper lip and travel indicator o-ring.

  4. Adjust air pressure in 5-psi increments until the recommended sag of 10mm is achieved.

An alternative to setting sag is to set the air pressure according to the BRAIN AIR SPRING SETTINGS table below:

  1. Find the rider’s weight in the RIDER WEIGHT column.

  2. Set the air pressure as indicated in the MAIN AIR CHAMBER PRESSURE column.


Rider Weight

lbs. (kg)

Main Air Chamber Pressure PSI

90 - 100 (41 - 45)

70 - 75

110 - 110 (45 - 50)

75 - 80

110 - 120 (50 - 54)

80 - 85

120 - 130 (54 - 60)

85 - 90

130 - 140 (60 - 64)

90 - 95

140 - 150 (64 - 68)

95 - 100

150 - 160 (68 - 73)

100 - 110

160 - 170 (73 - 77)

110 - 120

170 - 180 (77 - 82)

120 - 130

180 - 190 (82 - 86)

130 - 140

190 - 200 (86 - 91)

140 - 150

200 - 210 (91 - 95)

150 - 160

210 - 220 (95 - 100)

160 - 170

220 - 230 (100 - 104)

170 - 180

230 - 240 (104 - 109)

180 - 190

240 - 250 (109 - 113)

190 - 200

250 - 265 (113 - 120)

200 - 210

265 - 280 (120 - 127)

210 - 220

280 - 295 (127 - 134)

220 - 230

Adjusting Rebound

Rebound controls the rate at which your shock returns after it has been compressed. The proper rebound setting is a personal preference, and changes with rider weight, riding style and conditions. A rule of thumb is that rebound should be as fast as possible without kicking back and pushing the rider off the saddle.

The rebound knob has 8-10 clicks of adjustment.

For slower rebound, turn the red adjuster knob clockwise.

For faster rebound, turn the red adjuster knob counterclockwise.

Adjusting BrainFade

The BRAIN shocks is equipped with FOX BrainFade suspension technology.  BrainFade allows you to dial in your shock to match riding conditions, from a fully locked out suspension to soft TrailTune, which provides a stable yet supple platform that soaks up bumps but keeps suspension bob to a minimum during hard pedaling.  

For a firmer ride, turn the blue dial clockwise.

For a softer ride, turn the blue dial counterclockwise.

To determine which BrainFade position works best, pedal the bicycle at about 15 MPH and monitor the shock movement. Turn the dial and choose the setting that reduces suspension movement most effectively while providing the desired amount of bump absorption. The setting may change depending on conditions and riding styles.