3.5. AIR VOLUME ADJUSTMENT The progressivity adjustment featured on the Kirk, allows you to act on the air spring rate on the last third of stroke. Therefore, from satisfying settings (air pressure and hydraulic) on the first half of the stroke, you can act on the last mm of travel. The most featured and simple cases are : 1. The shock has an overal setup to single out comfort and grip,and the bikes is quite low : by increasing the rate you will get a better control of the châssis through the shock and avoid bottoming out. The rate curve is more progressive (increasing at the end). 2. The overal setup of the shock is more responsive, with a chassis balance quite high. By decreasing the rate, you can make sure that you use all the travel. This setting is made through the o’rings placed inside the air chamber, by adding or removing some. We suggest you to go step by step. At first play with two o’rings, then end the setting more precisely, with one o’ring. By adding one o’ring in the chamber, the spring rate will increase of 2%. Usually, the correct setting is made with 0 to 4 o’rings. But the range can go up to 10 o’rings depending on the bikes.