What does a linear spring rate mean for my car's handling?

A linear spring rate means the force exerted by the spring increases at a constant rate as it's compressed. This offers predictable suspension behavior, which is beneficial for tuning your vehicle's handling and responsiveness during spirited driving or track use.

What is the inner diameter of this spring?

This AST Linear Race Spring has an inner diameter of 61mm. This measurement is important for ensuring it fits correctly onto the shock body of your coilover suspension system.

What is the spring rate of this AST spring?

This AST Linear Race Spring has a spring rate of 90 Newtons per millimeter (N/mm). This indicates how stiff the spring is; a higher number means a stiffer spring.

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Specifications

Brand: AST
Part #: AST-300-90-61
UPC: astAST-300-90-61

AST Linear Race Springs - 300mm Length x 90 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 300mm Length x 90 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-300mm-length-x-90-n-mm-rate-x-61mm-id-single-t14-329905
Price: 103.36 USD
Availability: BackOrder

$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.

Key Features

AST Linear Race Spring with a 300mm length.
Features a 90 N/mm spring rate for precise suspension control.
Designed with a 61mm inner diameter for compatibility with many coilover systems.
Linear spring rate offers predictable and consistent suspension response.
Well-built to handle repeated stress during demanding driving conditions.

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About this part

Product Details

AST is known for making high-performance suspension components, and these Linear Race Springs are a solid example of their focus on track-ready parts. This specific spring is designed for use in coilover setups where a precise spring rate and consistent performance are critical. With a length of 300mm, a spring rate of 90 Newtons per millimeter, and a 61mm inner diameter, it's built to handle the demands of spirited driving and track use.

The linear spring rate means that as the spring is compressed, the force it exerts increases proportionally. This predictable behavior is essential for tuning suspension for optimal handling and responsiveness, especially when you're pushing your vehicle's limits. The well-built construction ensures it can withstand repeated stress without significant fatigue, maintaining its intended performance over time.