Shock Length Calculator

In both cases you are car enthusiast or a mechanic and want to fine-tune your vehicle’s suspension system, Use this Shock Length Calculator. Just enter Distance between upper and lower shock mount (in), Distance between bump stop and axle (in), in the input fields of the calculator and the calculator will display Collapsed Shock Length (in) and Extended Shock Length (in) of your car.

Shock Length Calculator

Enter any 2 values to calculate the missing variables




























Shock measurement calculation tool

What Is Shock Length?

Shock length is the distance between the mounting points of the shock absorber. This length plays a vital role in maintaining the suspension performance of the vehicle and enabling the shocks to absorb impact.

User Guide

The Shock Length Calculator comes in two modes: Basic and Advanced, you switch which one is better for your requirements.

1. Basic Mode

In the Basic Calculator, simply input the distance between the upper and lower shock mounts, along with the distance between the bump stop and the axle. The calculator will then determine the collapsed shock length and the extended shock length based on your inputs.

2. Advanced Mode

For more precise adjustments, you can switch to the Advanced Calculator. Here, you can enter the total suspension travel, ride height adjustment, and the minimum shock length. The calculator will compute the adjusted collapsed and extended lengths, taking into account your specific requirements.

Example Input Values:

  • Distance between upper and lower shock mounts (D1): 12 inches
  • Distance between bump stop and axle (D2): 4 inches

Formula Used

The formula to calculate the shock length is:

SHOCK=(D1D2)1\text{SHOCK} = (D1 – D2) – 1

Where:

Variable Description
SHOCK Shock Length (inches)
D1 Distance between upper shock mount and lower shock mount (inches)
D2 Distance between bump stop and axle (inches)

How to Calculate Shock Length

1. Measure D1: Distance between the upper shock mount and lower shock mount.

2. Measure D2: Distance between the bump stop and the axle.

3. Apply the Formula:

    • Subtract D2 from D1.
    • Subtract 1 from the result.

Calculation:

  • D1: 12 inches
  • D2: 4 inches

SHOCK=(124)1=7 inches\text{SHOCK} = (12 – 4) – 1 = 7 \text{ inches}

Calculation Examples

1. Basic

Measurement Value
Distance between upper and lower shock mounts (D1) 12 inches
Distance between bump stop and axle (D2) 4 inches
Calculated Shock Length (SHOCK) 7 inches

2. Advanced

Measurement Value
Distance between upper and lower shock mounts (D1) 15 inches
Distance between bump stop and axle (D2) 6 inches
Calculated Shock Length (SHOCK) 8 inches

Shock absorber Length Chart

 
Lift Height (in) Collapsed Length (in) Extended Length (in)
0 12.5 20
2 14.5 22
4 16.5 24
6 18.5 26
8 20.5 28
10 22.5 30

Importance & Benefits

Importance Benefits
Ensures proper suspension performance Improves ride comfort
Enhances vehicle stability Reduces wear and tear on tires
Prevents bottoming out Increases safety
Customizes suspension setup Adapts to different terrains
Matches shock length to lift height Optimizes off-road capability

FAQs

How to Choose the Correct Shock Size

Choosing the right shock size means measuring the frame of the vehicle at the mount locations and considering what the vehicle will be used for. Use the Shock Length Calculator to find the correct size.

What Size Shocks Do I Need for a 6 Inch Lift?

For a 6-inch lift, you’ll need longer shocks to match the extra length. Measure the new distance between the shock mounts after your lift, then use the calculator to find the proper shock length.

What Shocks Do I Need for a 3-Inch Lift?

For a 3-inch lift, measure from shock mount to shock mount after the lift. Plug these numbers into the calculator, and it will give you the proper shock size.

Using shock length calculator you surely adjust car shock length. In case you require any kind of additional information regarding this tool you can ask me in the comment section.

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