Total Riding Weight (pounds):
- The rider's weight with riding gear (average 5lbs
for riding gear weight)
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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)
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Rear
Wheel Travel & Shock Stroke: (inches
or millimeters)
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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%
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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.
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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.
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