Spring Rate=Rider Weight (lbs)×Rear Wheel Travel (ins)×0.65Shock Stroke (ins)2×Desired Sag (decimal)Spring Rate equals the fraction with numerator Rider Weight (lbs) cross Rear Wheel Travel (ins) cross 0.65 and denominator Shock Stroke (ins) squared cross Desired Sag (decimal) end-fraction Example Calculation: Rear Wheel Travel: Shock Stroke: Desired Sag:
Step 3 (Division)∶737.11.671=441.11 lbs/inStep 3 (Division) colon 737.1 over 1.671 end-fraction equals 441.11 lbs/in Fox SLS and standard steel springs are sold in . In this scenario, the rider should choose a spring for a firmer, more supportive ride, or a spring if their frame's linkage is highly progressive. 3. Fox DHX2 Spring Weight Recommendation Matrix dhx2 spring calculator
The calculator will output a number (e.g., 498 lb/in ). Springs come in standard increments (usually 50 lb increments, sometimes 25 lb). Spring Rate=Rider Weight (lbs)×Rear Wheel Travel (ins)×0
Turn the black spring preload collar counter-clockwise until the spring is loose. Turn it clockwise until the collar firmly touches the spring so it cannot rattle. This is zero preload . Fox DHX2 Spring Weight Recommendation Matrix The calculator
Calculated by dividing Rear Wheel Travel by Shock Stroke. For example:
: Total weight including all riding gear (helmet, shoes, hydration pack).