What is a linear spring rate?

A linear spring rate means that the force the spring exerts increases proportionally to how much it is compressed. For every millimeter the spring is compressed, it applies the same amount of force.

What is the benefit of a 200 N/mm spring rate?

A 200 N/mm spring rate is significantly stiffer than most stock springs. This increased stiffness helps reduce body roll during cornering and can lead to improved steering response and a more planted feel.

What does the 61mm ID refer to?

ID stands for Inner Diameter. The 61mm measurement indicates the inside diameter of the spring, which is important for ensuring it fits correctly onto your coilover shock body or spring perch.

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Specifications

Brand: AST
Part #: AST-140-200-61
UPC: astAST-140-200-61

AST Linear Race Springs - 140mm Length x 200 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 140mm Length x 200 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-140mm-length-x-200-n-mm-rate-x-61mm-id-single-t14-329782
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

Linear spring design for consistent force application.
Spring rate of 200 N/mm for increased stiffness.
140mm length.
61mm inner diameter.
Well-built for performance driving applications.

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About this part

Product Details

If you're rebuilding your coilovers or looking to fine-tune your suspension's stiffness, these AST Linear Race Springs are a solid option. They are designed to provide a consistent spring rate throughout their travel, which is crucial for predictable handling on the track or during spirited driving. The 200 N/mm rate offers a noticeable increase in stiffness over stock springs, helping to reduce body roll and improve responsiveness.

These springs measure 140mm in length and have a 61mm inner diameter, making them compatible with many coilover systems that use these common dimensions. The linear spring design means that for every millimeter the spring is compressed, it exerts the same amount of force, making suspension tuning more straightforward. They are well-built to handle the demands of racing and performance driving, ensuring they maintain their rate over time.