ProFlow Suspension
MTB Coil Spring Calculator
Estimate a starting coil spring rate for your mountain bike using rider weight, bike weight, rear travel, shock stroke, and suspension progression.
Setup Details
kg
kg
Used to estimate load on the rear suspension.
mm
Used with shock stroke to estimate average leverage ratio.
mm
Advanced bike setup optional
Use Progressive — 25% as a general starting point if you are unsure.
Results update live as you adjust your setup.
Recommended Spring Rates
33% sag
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30% sag
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28% sag
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Suggested test range
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Unrounded 30% estimate
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Selected progression
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This calculator provides an estimated starting point only. Final spring choice can vary with bike design,
preload, rider position, riding style, terrain, and suspension setup.
