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 pushes back with a consistent amount of force, in this case, 140 Newtons per millimeter.

What does the 61mm ID refer to?

ID stands for Inner Diameter. This measurement indicates the diameter of the hole in the center of the spring, which is important for ensuring it fits correctly onto the shock absorber body or spring perch of your coilover.

Is this spring sold individually?

Yes, this product listing is for a single linear race spring. If you need a pair or a full set for your vehicle, you will need to order the appropriate quantity.

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Specifications

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

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

Name: AST Linear Race Springs - 200mm Length x 140 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-200mm-length-x-140-n-mm-rate-x-61mm-id-single-t14-329857
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: Coilover suspension systems
Length: 200mm
Spring Rate: 140 N/mm
Inner Diameter: 61mm
Type: Linear race spring

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About this part

Product Details

AST is known for making well-built suspension components, and these linear race springs are no exception. This specific spring measures 200mm in length with a spring rate of 140 N/mm and a 61mm inner diameter. It’s designed to work with coilover setups where a linear spring rate is preferred for predictable handling.

The linear spring rate means that as the spring is compressed, the force it exerts increases at a constant rate. This offers a more direct and predictable feel compared to progressive springs, which can be beneficial for performance driving where consistent feedback is important. The 61mm inner diameter is a common size for many coilover applications, making it a versatile option for custom builds or replacements.