What is the spring rate of this AST spring?

This AST Linear Race Spring has a spring rate of 35 Newtons per millimeter (N/mm). This indicates how much force is required to compress the spring by a certain distance.

What does the 61mm ID refer to?

The 61mm ID refers to the inner diameter of the spring. This measurement is important for ensuring the spring fits correctly onto the shock absorber body or perch of your coilover assembly.

Are these springs sold in pairs?

No, these AST Linear Race Springs are sold individually. You can purchase them one at a time to create custom spring rate combinations or to replace a single damaged spring.

AST Linear Race Spring 250mm 35 N/mm 61mm ID AST-250-35-61

Name: AST Linear Race Springs - 250mm Length x 35 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-250mm-length-x-35-n-mm-rate-x-61mm-id-single-t14-329873
Price: 103.36 USD
Availability: BackOrder

AST Linear Race Springs - 250mm Length x 35 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: 250mm length, 35 N/mm rate, 61mm ID. Ideal for custom coilover builds needing specific spring rates.

Key Features

This is a single AST Linear Race Spring.
The spring measures 250mm in length.
It has a spring rate of 35 N/mm.
The inner diameter is 61mm.
Constructed from high-tensile steel for durability.

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Product Details

Starting with a 35 N/mm spring rate and a 250mm length, these AST Linear Race Springs are built for serious suspension tuning. The 61mm inner diameter is a common size for many performance coilover applications, making them a solid choice for custom builds or replacing worn-out springs. These springs are designed to provide a consistent force throughout their compression, which is crucial for predictable handling and control on the track or during spirited driving.

Crafted from high-tensile steel, these springs are made to withstand the rigors of performance driving. The linear rate means that for every millimeter the spring compresses, it exerts the same amount of force, allowing for precise suspension geometry calculations. This consistency is key when you're aiming to dial in your car's suspension for optimal performance and feedback.

If you're building a custom coilover setup or need to replace individual springs to achieve a specific ride height and stiffness, these AST springs offer a well-built option. They are sold individually, so you can mix and match rates or order pairs to suit your exact needs.