1. What is MTB Coil Spring Rate?

The spring rate (K) of a mountain bike (MTB) coil spring is a measure of its stiffness, defined as the amount of force required to compress the spring by a certain distance. It's a crucial parameter for suspension tuning.

2. How Does the Calculator Work?

The calculator uses the spring rate equation:

Where:

• \( K \) — Spring rate (N/mm)
• \( Load \) — Applied force (N)
• \( Deflection \) — Spring compression (mm)

Explanation: The spring rate represents the linear relationship between force and displacement for an ideal coil spring.

3. Importance of Spring Rate Calculation

Details: Proper spring rate selection ensures optimal suspension performance, rider comfort, and bike handling characteristics based on rider weight and riding style.

4. Using the Calculator

Tips: Enter the load in newtons (N) and deflection in millimeters (mm). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical spring rate for MTB shocks?
A: Rates vary by rider weight and bike type, but typically range from 300-600 N/mm for downhill bikes to 400-800 N/mm for enduro bikes.

Q2: How does spring rate affect ride quality?
A: Higher rates provide firmer suspension (better for heavy riders/aggressive riding), while lower rates offer plusher feel (better for light riders/technical trails).

Q3: Should I round up or down when selecting a spring?
A: Generally round to nearest available spring rate. When in doubt, softer is usually better for traction but may bottom out more easily.

Q4: How often should I check my spring rate?
A: Re-evaluate when changing riding style, bike setup, or if your weight changes by more than 5-10 kg.

Q5: What's the difference between spring rate and preload?
A: Spring rate is stiffness, preload is initial compression before riding. Preload adjusts sag but doesn't change spring rate.