What is a linear spring rate and why is it important?

A linear spring rate means the spring's resistance increases proportionally to how much it's compressed. This consistency is important for predictable suspension behavior, especially during hard cornering or braking, as it allows for more stable and responsive handling.

What does the 30 N/mm rate mean for my car's ride?

A 30 N/mm spring rate is firmer than most stock springs. This will result in a stiffer ride, which helps to minimize body roll during turns and can improve steering response. It's a common choice for performance-oriented setups where handling is a priority.

Are these springs sold individually or as a set?

This listing is for a single AST Linear Race Spring. If you are replacing springs on a coilover set, you will need to purchase two springs per axle (front or rear) to ensure balanced performance.

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Specifications

Brand: AST
Part #: AST-180-30-61
UPC: astAST-180-30-61

AST Linear Race Springs - 180mm Length x 30 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 180mm Length x 30 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-180mm-length-x-30-n-mm-rate-x-61mm-id-single-t14-329819
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

Fits coilovers with a 61mm inner diameter.
180mm spring length for proper suspension travel.
30 N/mm spring rate offers improved handling and reduced body roll.
Linear spring design provides consistent damping characteristics.
Well-built by AST for performance applications.

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About this part

Product Details

If you're building a custom coilover setup or replacing worn-out springs on your performance vehicle, these AST Linear Race Springs are a solid option. They offer a consistent spring rate throughout their travel, which is crucial for predictable handling during spirited driving or track use. The 30 N/mm rate provides a firmer ride than stock, helping to reduce body roll and improve responsiveness when you turn the wheel.

These springs are 180mm long with a 61mm inner diameter, designed to fit many common coilover bodies. AST is known for making well-built suspension components, and these springs are no exception. They're made from strong materials to handle the demands of performance driving, ensuring they maintain their rate over time. You'll notice improved stability and a more connected feel to the road with this setup.