your not adjusting the shock action,. it is the spring you are compressing,. on my downtown there is 5 settings in a row,. each one shortens the spring about 4 mm. if you are over 240 lb. I would go for three on the like 200, the numbers on the other side is probably a repeat ,. to check take the shock off and compress the spring and rotate the bezil, I did that to my downtown today # 5 shortens the spring about 1 inch, on my downtown,.