What does a linear spring rate mean for my car's handling?

A linear spring rate means the force required to compress the spring increases at a constant rate. This provides predictable suspension behavior and allows for consistent damping control, which is beneficial for performance driving and track use.

What is the inner diameter of this spring?

This AST Linear Race Spring has an inner diameter of 61mm. It's important to ensure this matches the specifications of your coilover shock bodies for a proper fit.

How many springs are included in this purchase?

This product listing is for a single AST Linear Race Spring. You will need to order the appropriate quantity to replace all the springs on your vehicle's suspension setup.

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Specifications

Brand: AST
Part #: AST-120-380-61
UPC: astAST-120-380-61

AST Linear Race Springs - 120mm Length x 380 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 120mm Length x 380 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-120mm-length-x-380-n-mm-rate-x-61mm-id-single-t14-329737
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

This is a single AST Linear Race Spring.
It measures 120mm in length.
The spring rate is 380 N/mm, offering a firm and responsive suspension characteristic.
The inner diameter is 61mm, designed to fit specific coilover bodies.
Constructed from high-tensile steel for durability under load.

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About this part

Product Details

Starting with a 61mm inner diameter, these AST Linear Race Springs are built for performance applications where precise suspension control is key. The 120mm length and a spring rate of 380 N/mm mean these springs offer a firm, responsive feel that's well-suited for track days or spirited driving where consistent damping and predictable handling are paramount.

Crafted from high-tensile steel, these springs are designed to withstand the rigors of demanding use. The linear rate means that as the spring compresses, the force increases proportionally, providing consistent feedback to the driver and allowing for fine-tuning of suspension geometry. This makes them a popular choice for builders looking to optimize their coilover setups for specific track conditions or driving styles.

This is a single spring, so be sure to order the correct quantity needed for your application. They are intended for use with compatible coilover bodies that match the 61mm inner diameter.