What is the purpose of a linear spring rate?

A linear spring rate means the spring's resistance increases at a constant rate as it's compressed. This provides predictable suspension behavior, which is beneficial for tuning and control during performance driving.

What does the 90 N/mm rate signify?

The 90 N/mm rate indicates how stiff the spring is. For every millimeter the spring is compressed, it will exert 90 Newtons of force. A higher N/mm value means a stiffer spring, which generally leads to less body roll and a more responsive feel.

What is the inner diameter of this spring?

This AST Linear Race Spring has an inner diameter of 61mm. This is a common size for many performance coilover systems, but it's always best to measure your existing spring perch or shock body to ensure compatibility.

AST Linear Race Spring 120mm 90 N/mm 61mm ID AST-120-90-61

Name: AST Linear Race Springs - 120mm Length x 90 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-120mm-length-x-90-n-mm-rate-x-61mm-id-single-t14-329717
Price: 103.36 USD
Availability: BackOrder

AST Linear Race Springs - 120mm Length x 90 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: 120mm length, 90 N/mm rate, 61mm ID. A well-built spring for performance suspension setups.

Key Features

This is a single AST Linear Race Spring.
The spring measures 120mm in length.
It has a spring rate of 90 N/mm.
The inner diameter is 61mm.
Designed for performance suspension and coilover applications.

Secure CheckoutFast Shipping631-982-0042

Product Details

Starting with a 90 N/mm spring rate and a 120mm length, these AST Linear Race Springs are built for serious suspension tuning. The 61mm inner diameter is a common size for many performance coilover applications, making it a versatile choice for builders looking to fine-tune their vehicle's handling. These springs are designed to provide a consistent and predictable response, crucial for maintaining control during aggressive driving or on track days. The linear rate means the spring's resistance increases steadily as it compresses, offering a straightforward way to adjust your suspension's stiffness without complex valving. They are a solid option for those rebuilding or upgrading their coilover assemblies.

Crafted with performance in mind, these springs are made from durable materials to withstand the rigors of demanding use. The consistent spring rate helps ensure that your suspension behaves predictably, allowing for improved cornering and stability. When setting up your suspension, understanding the spring rate is key; a higher N/mm value indicates a stiffer spring, which can reduce body roll and improve responsiveness. These AST springs offer a specific rate that many tuners seek for a balanced performance setup.