What does a 150 N/mm spring rate mean for my car?

A 150 N/mm spring rate indicates a firm spring. This means it will resist compression more strongly than a softer spring, leading to a more controlled ride and improved handling during aggressive driving or track use.

Are these springs sold individually or as a set?

These AST Linear Race Springs are sold individually. If you need a set for your coilovers, you will need to purchase the required number of springs separately.

What is the inner diameter of this spring?

The inner diameter of this AST Linear Race Spring is 61mm. This is a common size for many aftermarket and some OEM coilover applications, but it's always best to measure your existing spring perch or shock body to ensure compatibility.

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Specifications

Brand: AST
Part #: AST-100-150-61
UPC: astAST-100-150-61

AST Linear Race Springs - 100mm Length x 150 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 100mm Length x 150 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-100mm-length-x-150-n-mm-rate-x-61mm-id-single-t14-329697
Price: 103.36 USD
Availability: BackOrder

$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.

Key Features

This is a single AST Linear Race Spring.
The spring rate is 150 N/mm, providing a firm and responsive suspension feel.
It measures 100mm in length.
The inner diameter is 61mm, a common size for many coilover applications.
Constructed from high-tensile steel for durability under demanding conditions.

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About this part

Product Details

These AST Linear Race Springs are built with a 150 N/mm spring rate, meaning they offer a firm, controlled response for performance driving. The 100mm length and 61mm inner diameter are common dimensions for many coilover setups, making them a versatile option for builders looking to fine-tune their suspension.

Constructed from high-tensile steel, these springs are designed to withstand the rigors of track use and spirited driving. The linear rate ensures predictable handling characteristics, as the spring force increases proportionally with compression. This consistency is crucial for maintaining chassis control during aggressive cornering and braking.

When rebuilding or upgrading your coilovers, selecting the right spring rate is key to achieving your desired handling balance. These AST springs offer a solid option for those seeking improved performance and a more connected feel to the road.