11mm
3.2
EQUALIZING AIR CHAMBERS
In order for your shock to function correctly, you must equalize the air chambers after setting your pressure.
To equalize the chambers, the shock must be mounted on the bike.
Place the travel checker O-ring at 11 mm from the seal of the shock, sit on your bike, and slowly compress the suspension until
the seal comes into the O-ring. Let the suspension slowly extend to its full travel. Slowly cycle the shock 15 times over the first
11mm of its travel to complete the equalization.
3.3
SETTING YOUR SAG
The sag is the amount of travel used by your suspension from your weight on the bike. It has to be set up by adjusting the air
pressure.
BOS recommends a sag percentage of 30 to 35 %.
The bike manufaturer may also indicate a percentage of SAG. Please refer to your bike’s user manual for this value. If the
manufacturer recommendation differs from ours, you should test the bike on the trail at different sag values to find the right
amount for your riding style.
How to measure and set your sag
Slide the travel checker O-ring up to your shock’s dust seal.
Sit on your bike (if possible dressed with your riding outfit) feet on the pedals - horizontal position, and let the suspension
compress under your weight. Get off the bike without pushing on the suspension any more, extend the rear suspension to its full
travel by pulling up the saddle, and measure the distance between the O-ring and the seal. This distance allows you to check the
percentage of SAG obtained with the current air pressure. To convert the distance into percentage, refer to the table below.
Length x travel (mm)
200x51
200x57
216x63
222x69
SAG (%)
30
35
30
35
30
35
30
35
Shock travel (mm)
15
18
17
20
19
22
21
24
If the sag is not correct, adjust the air pressure in 15 PSI steps. Equalize the air chambers after each adjustment.
Too much SAG
: increase the air pressure.
Not enough SAG:
reduce the air pressure.
11 mm
