Enter the mass of the weight (kg) and the difference in fork length (mm) into the Fork Spring Rate Calculator. The calculator will evaluate the Fork Spring Rate.

## Fork Spring Rate Formula

The following two example problems outline the steps and information needed to calculate the Fork Spring Rate.

FSR = M / L
• Where FSR is the Fork Spring Rate (kg/mm)
• M is the mass of the weight (kg)
• L is the difference in fork length (mm)

To calculate the fork spring rate, divide the mass of the weight by the difference in fork length.

## How to Calculate Fork Spring Rate?

The following example problems outline how to calculate Fork Spring Rate.

Example Problem #1:

1. First, determine the mass of the weight (kg).
• The mass of the weight (kg) is given as: 30.
2. Next, determine the difference in fork length (mm).
• The difference in fork length (mm) is provided as: 5.
3. Finally, calculate the Fork Spring Rate using the equation above:

FSR = M / L

The values provided above are inserted into the equation below and computed.

FSR = 30 / 5 = 6.00 (kg/mm)

Example Problem #2:

For this problem, the variables required are provided below:

mass of the weight (kg) = 40

difference in fork length (mm) = 3