STEP 23 SETTING SHOCK SAG Just as you did with your forks you now need to set the sag on your rear shock. The optimal sag on your rear shock is 30% of the piston’s movement inside the shock body (stroke). The distance between the two shock mounting bolts (eye-to-eye) without a rider on the bike is 185mm for both shocks. Sag at 30% (of the piston) equates to a 16mm reduction in the eye-to-eye measurement. So the correct eye-to-eye measurement for 30% sag on this shock is 169mm (185-16 = 169mm). With the help of a friend, sit in a normal riding position in full riding gear on the bike, pedals level. Bounce up and down on the bike a few times and then gently sit back down. While still sitting on the bike, and with the shock slightly compressed (sag), measure the length of the shock (eye-to-eye) and record that number (A). To check the amount of sag just minus the original number from the new measurement, that will be your sag measurement. If the eye-to-eye measurement is 169mm that will give you a sag measurement of 16mm, which gives you the exact 30% sag rate you are looking for. While adjusting your rear shock sag, keep in mind that you must keep your total turns of spring preload at a minimum of two turns and a maximum of five turns. If your sag number is higher than 30%, increase the spring preload by turning the preload collar clockwise (2-5 turns) (B). If your sag number is lower than 30%, decrease the spring preload by turning the preload collar counterclockwise (minimum of two turns from base). Check the sag measurement again and adjust as necessary. If you cannot get the correct sag you will probably need a different spring rate for your bike. A B PRELOAD COLLAR 43
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