What is a linear spring rate and why is it important?

A linear spring rate means the spring's resistance to compression increases at a constant rate. This provides predictable suspension behavior, making it easier to tune your vehicle's handling for specific conditions like track driving.

What does the 61mm ID refer to?

ID stands for Inner Diameter. The 61mm measurement indicates the diameter of the spring's opening, which needs to match the diameter of the coilover shock body it will be installed on.

Are these springs sold individually or as a set?

These AST Linear Race Springs are sold individually. If you are replacing springs on a coilover system, it is generally recommended to replace them in pairs for each axle to maintain balanced suspension performance.

AST Linear Race Spring 180mm 60 N/mm 61mm ID AST-180-60-61

Name: AST Linear Race Springs - 180mm Length x 60 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-180mm-length-x-60-n-mm-rate-x-61mm-id-single-t14-329825
Price: 103.36 USD
Availability: BackOrder

AST Linear Race Springs - 180mm Length x 60 N/mm Rate x 61mm ID - Single

$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.

AST Linear Race Springs - 180mm Length x 60 N/mm Rate x 61mm ID - Single

Key Features

Verified fitment for AST coilover systems.
Linear spring rate of 60 N/mm for consistent suspension response.
180mm length provides a specific travel and ride height range.
61mm inner diameter fits many common coilover shock bodies.
Constructed from high-tensile steel for durability under load.

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Product Details

Starting with a 60 N/mm spring rate and a 180mm length, these AST Linear Race Springs are built for performance applications where precise suspension control is key. The 61mm inner diameter ensures compatibility with many popular coilover setups. These springs are designed to provide a consistent and predictable response under load, helping to maintain tire contact with the road during aggressive driving or track use. Their linear design means the spring rate remains constant throughout its compression, offering straightforward tuning for suspension engineers and experienced mechanics.

Crafted from high-tensile steel, these springs are built to withstand the rigors of demanding use without deforming. The straightforward linear design makes them easier to understand and implement into a suspension system compared to progressive rate springs. This makes them a solid option for those looking to fine-tune their vehicle's handling characteristics for track days or spirited driving, offering a well-built component for a performance-oriented suspension build.