What is a linear spring rate?

A linear spring rate means that for every inch the spring is compressed, the force it exerts increases by a consistent amount. This results in predictable suspension behavior, which is beneficial for performance driving.

How does spring rate affect my car's handling?

A higher spring rate, like the 65 N/mm on this spring, generally reduces body roll during cornering and improves steering response. However, it can also lead to a firmer ride compared to a lower spring rate.

What is the inner diameter of this spring?

This AST Linear Race Spring has an inner diameter of 61mm, which is a common size for many aftermarket coilover systems.

AST Linear Race Spring 300mm 65 N/mm 61mm ID AST-300-65-61

Name: AST Linear Race Springs - 300mm Length x 65 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-300mm-length-x-65-n-mm-rate-x-61mm-id-single-t14-329900
Price: 103.36 USD
Availability: BackOrder

AST Linear Race Springs - 300mm Length x 65 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 - 300mm Length x 65 N/mm Rate x 61mm ID - Single

Key Features

Fits: Check manufacturer fitment data to confirm compatibility with your vehicle.
Spring Rate: 65 N/mm provides a firm suspension setup.
Length: 300mm.
Inner Diameter: 61mm.
Type: Linear coilover spring.

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Product Details

These AST Linear Race Springs are built with a 65 N/mm spring rate, offering a firm setup for performance-oriented suspension systems. The 300mm length and 61mm inner diameter are common dimensions for many coilover applications, making them a versatile choice for builders looking to fine-tune their ride characteristics.

Constructed from high-tensile steel, these springs are designed to handle the stresses of track use and spirited driving. The linear rate means that as the spring compresses, the force increases proportionally, providing predictable suspension response. This predictability is crucial for maintaining control during hard cornering and braking, allowing you to feel more connected to the road.

When selecting springs, consider how the rate will affect your vehicle's handling. A stiffer spring like this 65 N/mm unit will reduce body roll and improve steering response, but it can also make the ride firmer. It's often paired with matching dampers to achieve the desired balance of performance and comfort for your specific setup.