Installing Your Fork | Before You Ride | Setting Sag | Adjusting Rebound | Changing the Coil Spring | Locking Out the Fork | Service Intervals | Important Safety Information
|
weight |
4.35 lbs./1.97 kg |
travel |
5.5 in. / 140 mm |
|
features/adjustments |
lockout, coil spring preload, rebound |
|
spring/damper type |
steel spring/open bath |
|
intended use |
||
color |
Black Diamond |
Be sure your fork is properly installed before proceeding. Clicking on the link above will take you to a new page.
You can also view a Flash video on Setting Sag.
To get the best performance from your fork, it is necessary to set and adjust sag. Generally, sag should be set to 15 – 25% of total fork travel.
FOX Part # |
Approximate Spring Rate |
Color Code |
Travel (mm) |
Rider Weight |
039-05-080 |
40.6 lb/in |
Black |
140 |
<90–115 |
039-05-081 |
48.5 lb/in |
Purple |
140 |
115–150 |
039-05-082 |
56.4 lb/in |
Blue |
140 |
150–180 |
039-05-083 |
60.9 lb/in |
Green |
140 |
180–210 |
Symptom |
Remedy |
Too much sag |
Change to higher rate coil spring |
Too little sag |
Change to lower rate coil spring |
Excessive bottoming |
Change to higher rate coil spring |
Harsh ride; full travel not utilized |
Change to lower rate coil spring |
The rebound knob (shown below) is located on the top of the right fork leg, and has 12 clicks of adjustment. Rebound controls the speed at which the fork extends after compressing. Turning the knob clockwise slows down rebound; turning the knob counterclockwise speeds up rebound. As a starting point, turn the rebound adjuster knob all the way clockwise (full in) until it stops, then turn counterclockwise (out) 6 clicks.
Knob Setting |
Setting Description |
Tuning Tips |
Setup Tips |
1 |
Slow Rebound |
Too slow and your fork will pack down and ride harshly. |
If you increase your spring rate or air pressure, you will need to slow down your rebound |
6 (Factory setting) |
Average Rebound |
|
|
12 |
Fast Rebound |
Too fast and you will experience poor traction and wheel hop. |
If you decrease your spring rate or air pressure, you will need to speed up your rebound setting. |
The blue compression lockout lever is located below the red rebound adjuster knob. It allows the rider to close the compression damping circuit in the fork. This keeps the fork at the top of its travel, making it harder to compress.
Rotate the lever fully clockwise to lockout the fork. This position is useful in climbing and sprinting situations, but will sag with the rider’s weight. The fork will "blowoff" in the event that a big hit is encountered with the fork locked out.
To unlock the fork, simply rotate the lever fully counterclockwise.
32MM Vanilla forks cannot be reduced in travel.
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Bushing Technology & Inspection | Seals & Foam Rings | Seal Cleaning | Control Direction | Oil Volumes | Structural Inspection | Dropout Thickness Inspection | Torque Values| Unit Conversion | Suspension Tuning Tips | Using the Pump | Important Safety Information | Service Intervals | Contact FOX Service | Warranty Information