What is a linear spring rate?

A linear spring rate means the spring's resistance increases proportionally to how much it's compressed. For every millimeter the spring is compressed, it pushes back with a consistent amount of force (220 N/mm in this case). This provides predictable handling and control.

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 in a coilover setup.

Is this spring sold individually or as a set?

This product listing is for a single AST Linear Race Spring. If you are building or replacing a set of coilovers, you will need to purchase multiple springs to match your application's requirements.

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Specifications

Brand: AST
Part #: AST-140-220-61
UPC: astAST-140-220-61

AST Linear Race Springs - 140mm Length x 220 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 140mm Length x 220 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-140mm-length-x-220-n-mm-rate-x-61mm-id-single-t14-329783
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

Fits vehicles with 61mm inner diameter coilover systems.
Features a linear spring rate of 220 N/mm for predictable suspension response.
Measures 140mm in length.
Designed for performance and racing applications.

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About this part

Product Details

This is a single AST Linear Race Spring, measuring 140mm in length with a spring rate of 220 N/mm and a 61mm inner diameter. These springs are designed for performance applications, often used in coilover setups where precise suspension control is critical. The linear rate means the spring's resistance increases uniformly as it's compressed, providing predictable handling characteristics.

Built for demanding use, this spring is a well-built component for those looking to fine-tune their vehicle's suspension. Its 61mm inner diameter is a common size for many coilover systems, making it a versatile option for custom builds or replacements. The 220 N/mm rate offers a firm ride, suitable for track days or spirited driving where reduced body roll and improved responsiveness are desired.