What is the purpose of a helper spring?

Helper springs are used in coilover suspension systems to maintain preload on the main spring when the suspension is fully extended. This prevents the main spring from becoming loose or unseated, which can cause noise and affect suspension performance.

How do I know if these springs will fit my coilovers?

These helper springs have a 75mm inner diameter, which is a common size for many aftermarket coilover systems. It's important to measure the inner diameter of your main coilover springs or the spring perch to ensure compatibility.

What does the 30 N/mm spring rate mean?

The 30 N/mm spring rate indicates how stiff the helper spring is. This is a relatively light rate, meaning it provides a gentle assist to keep the main spring seated without significantly altering the overall ride stiffness.

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Specifications

Brand: AST
Part #: AST-65-30-75
UPC: astAST-65-30-75

AST Helper Springs - 65mm Length x 30 N/mm Rate x 75mm ID - Set of 2

Name: AST Helper Springs - 65mm Length x 30 N/mm Rate x 75mm ID - Set of 2
Brand: AST
SKU: ast-ast-helper-springs-65mm-length-x-30-n-mm-rate-x-75mm-id-set-of-2-t14-329915
Price: 103.36 USD
Availability: BackOrder

$103.36

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Key Features

Fits coilovers with a 75mm inner diameter.
65mm length provides appropriate preload for many suspension setups.
30 N/mm spring rate offers a light assist to the main spring.
Set includes two helper springs.
Designed to keep main coilover springs seated at full extension.

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About this part

Product Details

These are AST helper springs, measuring 65mm in length with a spring rate of 30 Newtons per millimeter and a 75mm inner diameter. They come as a set of two, intended to work with coilover suspension systems.

Helper springs are designed to maintain preload on the main coilover spring when the suspension is fully extended, preventing the main spring from unseating. This ensures the suspension stays connected and quiet, even during extreme articulation. The 30 N/mm rate offers a light assist, complementing the primary spring without significantly altering the overall suspension feel. Their 75mm inner diameter is a common size for many coilover applications, making them a versatile choice for fine-tuning your suspension setup.