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

A linear spring rate means the spring's resistance increases directly with compression. This offers predictable suspension behavior, making it easier to tune for specific driving conditions and providing a more connected feel to the road.

What is the inner diameter of this spring?

This AST linear race spring has an inner diameter of 61mm. It's important to ensure this matches the diameter of your coilover shock body for proper fitment.

What is the purpose of a 20 N/mm spring rate?

A 20 N/mm spring rate is considered a performance-oriented rate, offering a firmer ride than stock springs. It's often used in track or autocross applications to reduce body roll and improve responsiveness.

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Specifications

Brand: AST
Part #: AST-100-20-61
UPC: astAST-100-20-61

AST Linear Race Springs - 100mm Length x 20 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 100mm Length x 20 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-100mm-length-x-20-n-mm-rate-x-61mm-id-single-t14-329685
Price: 124.03 USD
Availability: BackOrder

$124.03

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

Fits coilovers with a 61mm inner diameter.
Features a linear spring rate of 20 N/mm for consistent force application.
Measures 100mm in length.
Designed for performance and track applications.

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About this part

Product Details

AST is a well-known name in the performance suspension world, and these linear race springs are a testament to that. If you're building or rebuilding a coilover setup, especially for track or spirited driving, a spring with a consistent rate like this one is key. This particular spring offers a 20 N/mm rate, meaning for every millimeter the spring compresses, it exerts 20 Newtons of force back. This rate is often chosen for improved handling and a more connected feel to the road.

Measuring 100mm in length with a 61mm inner diameter, these springs are designed to fit specific coilover bodies. The linear spring design means the force increases proportionally with compression, providing predictable suspension behavior. This makes it easier to tune your suspension for a specific track or driving style, as the spring's response is straightforward and consistent.