What is a linear spring rate?

A linear spring rate means that for every inch the spring is compressed, the force required to compress it further increases by a consistent amount. This provides predictable suspension behavior.

What does the 61mm ID refer to?

ID stands for Inner Diameter. The 61mm measurement indicates the diameter of the hole in the center of the spring, which needs to match the diameter of your coilover shock body or perch.

Are these springs sold individually?

Yes, this listing is for a single AST Linear Race Spring. If you are replacing springs on a coilover set, you will need to purchase the appropriate number of springs for your application.

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Specifications

Brand: AST
Part #: AST-80-120-61
UPC: astAST-80-120-61

AST Linear Race Springs - 80mm Length x 120 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 80mm Length x 120 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-80mm-length-x-120-n-mm-rate-x-61mm-id-single-t14-329672
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 compatible coilover systems.
Linear spring rate of 120 N/mm for consistent suspension response.
80mm spring length.
61mm inner diameter.
Designed for performance and track applications.

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About this part

Product Details

This is a single AST Linear Race Spring, measuring 80mm in length with a spring rate of 120 N/mm and a 61mm inner diameter. These springs are designed for performance applications where precise suspension control is crucial.

The linear rate means the spring's resistance increases consistently as it's compressed, offering predictable handling characteristics. This makes them a solid choice for track day cars or performance street setups where you need the suspension to react in a uniform manner to load changes. The 61mm inner diameter is a common size for many coilover systems, but always double-check your existing setup to ensure compatibility.

When rebuilding or upgrading your coilovers, selecting the right spring rate is key to achieving your desired ride and handling. These AST springs are well-built for demanding use.