What is a linear spring rate and why is it important?

A linear spring rate means the spring's resistance to compression increases at a constant rate. This makes suspension behavior predictable and easier to tune for specific handling characteristics.

What does the 61mm ID refer to?

ID stands for Inner Diameter. The 61mm measurement indicates the diameter of the spring itself, which needs to match the perch or collar on your coilover shock body for proper fitment.

How many springs do I need to order?

This product listing is for a single spring. You will need to order the appropriate quantity to match the number of coilovers on your vehicle, typically four.

AST Linear Race Spring 130mm 280 N/mm 61mm ID AST-130-280-61

Name: AST Linear Race Springs - 130mm Length x 280 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-130mm-length-x-280-n-mm-rate-x-61mm-id-single-t14-329760
Price: 103.36 USD
Availability: BackOrder

AST Linear Race Springs - 130mm Length x 280 N/mm Rate x 61mm ID - Single

$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 Linear Race Springs - 130mm Length x 280 N/mm Rate x 61mm ID - Single

Key Features

This is a single AST Linear Race Spring.
It measures 130mm in length.
The spring rate is 280 N/mm, providing firm damping characteristics.
The inner diameter is 61mm, suitable for many coilover applications.
Constructed from high-tensile steel for durability.

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Product Details

With a 280 N/mm spring rate, these AST Linear Race Springs are built for serious suspension tuning. The 130mm length and 61mm inner diameter are common dimensions for many performance coilovers, offering a solid foundation for a custom setup or replacement. These springs are designed to provide a consistent spring rate throughout their travel, which is crucial for predictable handling and feedback from your vehicle's suspension.

Crafted from high-tensile steel, these springs are made to withstand the rigors of track use and aggressive driving. The linear rate means that for every millimeter the spring is compressed, it exerts the same amount of force, making suspension calculations more straightforward for builders and tuners. This predictability is key when fine-tuning your car's cornering ability and overall balance.

If you're building a track-focused coilover setup or need to replace worn-out springs on an existing performance suspension, these AST springs offer a well-built option. They are a single spring, so be sure to order the correct quantity for your application.