What is the purpose of a helper spring?

Helper springs sit at the bottom of a coilover assembly. Their main job is to keep the primary spring seated and prevent it from rattling when the suspension is fully extended, like during a large bump or when the wheel is in the air.

What does the spring rate of 30 N/mm mean?

A spring rate of 30 N/mm indicates how much force is required to compress the spring by one millimeter. This is a relatively light rate, typical for helper springs which are not meant to carry the primary load of the vehicle.

Will these helper springs fit my existing coilovers?

These helper springs have a 64mm inner diameter, which is a common size for many aftermarket coilover systems. It's always best to measure the inner diameter of your main spring perch or the outer diameter of your main spring to ensure a proper fit.

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Specifications

Brand: AST
Part #: AST-65-30-64
UPC: astAST-65-30-64

AST Helper Springs - 65mm Length x 30 N/mm Rate x 64mm ID - Set of 2

Name: AST Helper Springs - 65mm Length x 30 N/mm Rate x 64mm ID - Set of 2
Brand: AST
SKU: ast-ast-helper-springs-65mm-length-x-30-n-mm-rate-x-64mm-id-set-of-2-t14-329914
Price: 103.36 USD
Availability: BackOrder

$103.36

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Set of 2 AST helper springs.
Each spring is 65mm in length.
Features a spring rate of 30 N/mm.
Has a 64mm inner diameter, a common size for coilovers.
Helps maintain spring preload and keep main springs seated.

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About this part

Product Details

When you're rebuilding your suspension or fine-tuning your ride height, helper springs play a crucial role in maintaining proper preload on your coilovers. These AST helper springs are designed to sit at the bottom of your coilover assembly, ensuring that your main spring stays seated even when the suspension is fully extended. This prevents rattling and ensures your suspension is always ready to respond.

This set includes two helper springs, each measuring 65mm in length with a spring rate of 30 N/mm and a 64mm inner diameter. They are well-built to handle the constant pressure they experience, helping to keep your coilovers functioning smoothly. The 64mm inner diameter is a common size for many coilover systems, making them a versatile option for your build.