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

A linear spring rate means the spring exerts the same amount of force for every millimeter it's compressed. This predictability is important for suspension tuning, as it allows for more accurate calculations and consistent handling response during driving.

What does the 61mm ID specification mean?

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

Are these springs sold individually or as a set?

These AST Linear Race Springs are sold individually. If you are replacing springs on a vehicle, you will typically need to purchase two or four springs depending on whether you are working on the front or rear axle, or all four corners.

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Specifications

Brand: AST
Part #: AST-130-150-61
UPC: astAST-130-150-61

AST Linear Race Springs - 130mm Length x 150 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 130mm Length x 150 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-130mm-length-x-150-n-mm-rate-x-61mm-id-single-t14-329751
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 vehicles with 61mm inner diameter coilover bodies.
Linear spring design offers consistent force throughout travel.
150 N/mm spring rate provides firm and controlled suspension response.
130mm length is compatible with many common coilover applications.
Well-built for demanding performance and racing use.

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About this part

Product Details

If you're rebuilding your coilovers or looking to fine-tune your suspension setup, these AST Linear Race Springs are a solid option. They are designed to provide a consistent spring rate throughout their travel, which is crucial for predictable handling and performance on the track or during spirited driving. The 150 N/mm rate offers a firm, controlled ride, ideal for vehicles where precise suspension response is a priority.

These springs measure 130mm in length and have a 61mm inner diameter, making them compatible with many common coilover systems. The linear spring design means that for every millimeter the spring is compressed, it exerts the same amount of force. This predictability helps suspension engineers and tuners dial in the vehicle's handling characteristics more accurately. They are well-built to withstand the rigors of racing and performance driving.