What is a linear spring rate?

A linear spring rate means that the force the spring exerts increases proportionally as it is compressed. This provides predictable suspension behavior, which is beneficial for performance driving where consistent feedback is important.

What does the spring rate (N/mm) mean for my car?

The spring rate indicates how stiff the spring is. A higher N/mm value, like the 190 N/mm on this spring, means a stiffer spring. This is generally used for performance or track applications to reduce body roll and improve responsiveness.

What does the 61mm ID refer to?

ID stands for Inner Diameter. The 61mm ID specifies the diameter of the coilover shock body or perch that this spring is designed to fit onto. It's important to ensure this matches your existing coilover setup.

AST Linear Race Spring 150mm 190 N/mm 61mm ID AST-150-190-61

Name: AST Linear Race Springs - 150mm Length x 190 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-150mm-length-x-190-n-mm-rate-x-61mm-id-single-t14-329807
Price: 103.36 USD
Availability: BackOrder

AST Linear Race Springs - 150mm Length x 190 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 - 150mm Length x 190 N/mm Rate x 61mm ID - Single

Key Features

Fits coilovers with 61mm inner diameter.
150mm length spring.
190 N/mm spring rate for performance applications.
Linear spring design offers predictable force increase with compression.
Well-built by AST for reliable performance.

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Product Details

AST is known for making well-built suspension components, and these Linear Race Springs are no exception. If you're building or rebuilding a performance suspension setup, these springs offer a specific rate and length to help you dial in your vehicle's handling. The 190 N/mm spring rate is a solid choice for track-focused applications where precise control and responsiveness are key.

These springs measure 150mm in length and have a 61mm inner diameter, making them compatible with many coilover systems that use this common sizing. The linear spring rate means that as the spring is compressed, the force increases proportionally, providing predictable suspension behavior during aggressive driving. This consistency is crucial for maintaining tire contact and control when pushing your vehicle to its limits.

When setting up a suspension, choosing the right spring rate is critical for balancing ride quality and performance. These AST springs are designed for enthusiasts who understand the importance of spring selection in achieving optimal handling characteristics.