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Leverage Ratio Formula:
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Leverage ratio is a key parameter in mountain bike suspension design that represents the relationship between rear wheel travel and shock stroke. It indicates how much the rear wheel moves relative to the shock compression.
The calculator uses the leverage ratio formula:
Where:
Explanation: The ratio shows how much mechanical advantage the suspension linkage provides. Higher ratios mean more wheel travel per unit of shock stroke.
Details: Understanding leverage ratio helps in suspension tuning, shock selection, and predicting suspension behavior. It affects progression, spring rate requirements, and overall suspension performance.
Tips: Enter rear wheel travel and shock stroke in millimeters. Both values must be positive numbers. Typical leverage ratios range from 2.0 to 3.5 for most mountain bikes.
Q1: What is a typical leverage ratio for mountain bikes?
A: Most modern mountain bikes have leverage ratios between 2.5 and 3.2, though this varies by suspension design and intended use.
Q2: How does leverage ratio affect suspension feel?
A: Higher leverage ratios generally create more progressive suspension curves, while lower ratios provide more linear feel throughout the travel.
Q3: Can I change the leverage ratio on my bike?
A: Leverage ratio is determined by the frame's suspension linkage design and cannot be easily changed without modifying the frame structure.
Q4: Why is leverage ratio important for shock selection?
A: The leverage ratio determines the effective spring rate at the wheel. You need to account for it when choosing appropriate spring rates or air pressure for your shock.
Q5: Does leverage ratio remain constant through the travel?
A: No, most modern suspension designs have progressive or regressive leverage ratios that change throughout the suspension stroke, creating different suspension characteristics.