Total Riding Weight (pounds):

• The rider's weight with riding gear (average 5lbs for riding gear weight)

Rear Weight Bias (percent):

• The standard formula is based on a 60:40, Rear to Front weight distribution
• Add 5% for a heavy rider (+200lbs.)
• Subtract 5% for a light rider (150lbs-)
• Add 2% for a recreational or beginner rider (more rearward bias)
• Subtract 2% for a pro-level or highly experienced rider (less rearward bias)

Rear Wheel Travel & Shock Stroke: (inches or millimeters)

Shock Sag: (percentage of shock stroke)

• The standard for downhill is 30% sag
• The standard for extreme free-riding is 27% sag
• The standard for all-mountain riding is 25%

Preload Adjuster: (number of turns) The standard formula ignores the effect of applying preload and tends to calculate too high a spring rate. Usually 1.0 is required to lock the spring to the shock body. Choose a preload value that will allow some plus or minus adjustment consistent with your required sag level and re-submit. A zero preload spring rate is found, then preload is applied to find an alternate spring rate taking into account the preload spring tension. Calculation is based on a linear progression.

End-Coil Effect: (percent) Closed/Ground compression springs have a typically lower spring rate in their initial deflection range. The suggested value is a best guess of the effect ECE will have on preload adjustment. It is a percentage of the overall spring rate used in calculating the spring tension for the specified number of turns of the preload adjuster.