It's just leverage ratio at different travel positions... so, along the bottom is 0-240mm of travel and along the side is the leverage ratio 1.4:1 through 3.7:1... The higher the leverage ratio, the softer your suspension will feel at that point. The lower the leverage ratio, the stiffer it will feel. So you can see that the M6 is very linear and only varies from about 2.75:1 at sag to 2.35:1 at full bottom out while the Uzzi or the 951 start out much softer at 3.1:1 or 3.4:1 at sag point and then ramp up from there to 2.1:1 for the Uzzi or 1.45:1 for the 951.

 I get it now! Thanks, man. It actually means a lot that someone would take time out of their day to help me.

 For a forum... some dumbass trying to claim his 130lb friend has to run a 600lb spring on his 951.

 LOL thats just bad