What does a linear spring rate mean?

A linear spring rate means the force required to compress the spring increases at a constant rate. For every millimeter the spring is compressed, the force increases by the specified N/mm value. This provides predictable suspension behavior.

What is the advantage of a 45 N/mm spring rate?

A 45 N/mm spring rate is firmer than most stock springs. This can lead to improved body control during cornering, braking, and acceleration, making the vehicle feel more responsive. It's often chosen for performance driving or track use.

How do I know if this spring will fit my coilovers?

This spring has a 61mm inner diameter. You should measure the inner diameter of your existing coilover spring perch or consult your coilover system's specifications to ensure it matches. The 180mm length also needs to be compatible with the available space in your coilover assembly.

AST Linear Race Spring 180mm 45N/mm 61mm ID AST-180-45-61

Name: AST Linear Race Springs - 180mm Length x 45 N/mm Rate x 61mm ID - Single
Brand: AST
Price: 103.36 USD
Availability: InStock

AST Linear Race Springs - 180mm Length x 45 N/mm Rate x 61mm ID - Single

$103.36

AST Linear Race Springs - 180mm Length x 45 N/mm Rate x 61mm ID - Single

Key Features

Fits vehicles with compatible coilover systems.
Linear spring design offers a consistent spring rate.
180mm length is suitable for many coilover applications.
45 N/mm spring rate provides a firmer ride for improved handling.
61mm inner diameter is a common size for coilover assemblies.

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Product Details

This is a single AST Linear Race Spring, measuring 180mm in length with a spring rate of 45 Newtons per millimeter and a 61mm inner diameter. These springs are designed for performance applications where a consistent and predictable spring rate is crucial for handling and control.

The linear spring design means that the spring rate remains constant throughout its compression. This predictability is important for tuning suspension setups, allowing for more precise adjustments to ride height and corner balancing. The 61mm inner diameter is a common size for many coilover systems, making it a versatile option for builders and racers looking to customize their suspension.

When building or rebuilding coilovers, selecting the right spring rate is key to achieving the desired handling characteristics. A 45 N/mm rate offers a firmer ride than stock, which can improve responsiveness on track or during spirited driving. Always ensure compatibility with your specific coilover body and mounting hardware before installation.