What is a linear spring rate?

A linear spring rate means that for every inch the spring is compressed, the force it exerts increases by a consistent amount. This provides predictable handling characteristics.

What does the 61mm ID refer to?

The 61mm ID refers to the inner diameter of the spring, which is important for ensuring it fits correctly onto the shock body or spring perch of your coilover assembly.

Are these springs sold individually?

Yes, these AST Linear Race Springs are sold individually, allowing you to purchase the exact number needed for your specific coilover setup.

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Specifications

Brand: AST
Part #: AST-180-120-61
UPC: astAST-180-120-61

AST Linear Race Springs - 180mm Length x 120 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 180mm Length x 120 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-180mm-length-x-120-n-mm-rate-x-61mm-id-single-t14-329835
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 coilover spring with a 120 N/mm rate for consistent suspension response.
180mm length and 61mm inner diameter are standard dimensions for many coilover systems.
Designed for performance applications where precise handling is important.

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About this part

Product Details

When you're building a performance suspension setup for track days or serious autocross, the right spring rate is crucial for handling. These AST Linear Race Springs are designed to give you a predictable and consistent response from your coilovers.

With a 120 N/mm spring rate, these springs offer a firm setup that helps reduce body roll and keeps the tire planted during hard cornering. The 180mm length and 61mm inner diameter are common dimensions for many coilover applications, making them a solid choice for custom builds or replacements. The linear rate means the spring's resistance increases steadily as it compresses, providing a direct feel between the steering wheel and the road.