What is a linear spring rate?

A linear spring rate means that for every millimeter the spring is compressed, the force it exerts increases by a consistent amount (320 N/mm in this case). This offers predictable suspension behavior.

What does the 61mm ID refer to?

ID stands for Inner Diameter. This measurement is crucial for ensuring the spring fits correctly onto the shock body or spring perch of your coilover system.

Is this spring suitable for daily driving?

With a 320 N/mm rate, this spring is quite firm and is primarily intended for performance, track, or racing applications where a stiff suspension is beneficial for handling.

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Specifications

Brand: AST
Part #: AST-120-320-61
UPC: astAST-120-320-61

AST Linear Race Springs - 120mm Length x 320 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 120mm Length x 320 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-120mm-length-x-320-n-mm-rate-x-61mm-id-single-t14-329734
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 applications.
Linear spring rate of 320 N/mm provides consistent suspension response.
Spring length is 120mm.
Designed for performance and racing applications.
Single spring included.

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About this part

Product Details

This is a single AST Linear Race Spring, measuring 120mm in length with a spring rate of 320 N/mm and a 61mm inner diameter. These springs are designed for performance applications where precise suspension control is crucial.

The linear spring design means that the force applied increases proportionally to the distance the spring is compressed. This predictable behavior is favored in racing and performance setups for consistent handling. The 320 N/mm rate offers a firm ride, suitable for track use or spirited driving where reduced body roll and improved feedback are desired. The 61mm inner diameter is a common size for many coilover systems, making it a versatile option for custom builds or replacements.