What is a linear spring rate?

A linear spring rate means the spring's resistance to compression increases at a constant rate. For every millimeter the spring is compressed, it exerts the same amount of force, making its behavior predictable for suspension tuning.

How many springs do I need for my car?

This listing is for a single spring. Most vehicles use four springs for a complete coilover suspension setup, one for each corner. You will need to order the appropriate quantity for your application.

What does the 61mm ID refer to?

The 61mm ID refers to the inner diameter of the spring. This measurement is important to ensure the spring fits correctly onto the shock body or perch of your coilover assembly.

AST Linear Race Spring 130mm 380 N/mm 61mm ID AST-130-380-61

Name: AST Linear Race Springs - 130mm Length x 380 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-130mm-length-x-380-n-mm-rate-x-61mm-id-single-t14-329765
Price: 103.36 USD
Availability: BackOrder

AST Linear Race Springs - 130mm Length x 380 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 - 130mm Length x 380 N/mm Rate x 61mm ID - Single

Key Features

This product includes one (1) AST Linear Race Spring.
Spring measures 130mm in length.
Spring rate is 380 N/mm.
Inner diameter is 61mm.
Linear spring design offers consistent force increase with compression.

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Product Details

This listing is for a single AST Linear Race Spring. You get one spring, measuring 130mm in length with a spring rate of 380 Newtons per millimeter and a 61mm inner diameter. These springs are designed for performance applications where precise suspension control is needed.

The linear spring rate means that as the spring is compressed, the force it exerts increases at a constant rate. This predictable behavior is crucial for tuning suspension response, especially in racing or track day setups. The 61mm inner diameter is a common size for many coilover systems, making it a versatile option for builders or those replacing worn-out springs.

When building or rebuilding coilovers, selecting the right spring rate is key to achieving the desired handling characteristics. A 380 N/mm rate offers a firmer ride than stock, providing improved body control during cornering and braking. Remember that this is a single spring; you'll need to purchase the correct quantity for your specific application, typically four for a full set of coilovers.