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3.3
SETTING YOUR SAG
The sag is the amount of travel used by your suspension from your weight on the bike. It is set by adjusting
the air pressure.
BOS recommends a sag percentage of 30 to 35 %, depending on your use and your riding style.
The bike manufacturer may also indicate a sag percentage. 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 stroke (mm)
SAG (%)
Shock travel (mm)
If the sag is not correct, adjust the air pressure in 15psi steps. Equalize the air chambers after each
adjustment.
Too much SAG: increase the air pressure.
Not enough SAG: reduce the air pressure.
222x67
35
30
24
23
240x76
30
35
20
24
267x87
30
35
23
24
SAG
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