What is the purpose of a helper spring?

Helper springs are designed to keep your main coilover spring seated at full suspension droop. They provide a small amount of preload and can help improve ride quality at low speeds by offering a softer initial response before the main spring engages.

What does the spring rate (20 N/mm) mean?

The spring rate indicates how much force is needed to compress the spring. A rate of 20 Newtons per millimeter means it takes 20 Newtons of force to compress the spring by 1 millimeter. This is a relatively soft rate, typical for helper springs.

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

These helper springs have a 64mm inner diameter. You'll need to ensure your coilover's spring perch or the main spring you are using has a compatible outer diameter for these helper springs to fit correctly.

AST Helper Springs 100mm 20 N/mm 64mm ID AST-100-20-64

Name: AST Helper Springs - 100mm Length x 20 N/mm Rate x 64mm ID - Set of 2
Brand: AST
SKU: ast-ast-helper-springs-100mm-length-x-20-n-mm-rate-x-64mm-id-set-of-2-t14-329929
Price: 103.36 USD
Availability: BackOrder

AST Helper Springs - 100mm Length x 20 N/mm Rate x 64mm ID - Set of 2

$103.36

On Backorder

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

AST Helper Springs - 100mm Length x 20 N/mm Rate x 64mm ID - Set of 2

Key Features

Set includes two helper springs.
100mm length.
20 N/mm spring rate.
64mm inner diameter.
Made from well-built steel.

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Product Details

If you're looking to fine-tune your coilover setup for improved ride quality and better control, especially during low-speed maneuvers or when dealing with uneven surfaces, these helper springs from AST are a solid option. They are designed to work with your existing coilover system, providing a bit of extra support without drastically altering the main spring's characteristics. This can help prevent the coilover from fully unseating at full droop, which is particularly useful for track cars or vehicles that see spirited driving.

These specific helper springs measure 100mm in length with a spring rate of 20 N/mm and a 64mm inner diameter, meaning they'll fit coilovers with a compatible spring perch. They are made from well-built steel, ensuring they can handle the constant compression and extension they'll experience. AST is known for making parts that perform well, and these springs are no exception, offering a practical way to adjust your suspension's behavior.

This set includes two helper springs, giving you what you need to outfit a single axle. When installing, ensure they sit correctly on the spring perch and don't bind against other suspension components. They are a straightforward addition to your coilover assembly, aiming to smooth out the initial part of the suspension travel.