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 provides predictable handling and consistent feedback from your suspension, which is important for performance driving.

What does the 61mm ID specification mean?

ID stands for Inner Diameter. The 61mm specification tells you the diameter of the spring itself, which needs to match the diameter of your coilover shock body or perch for a proper fit.

Are these springs sold individually or as a set?

These AST Linear Race Springs are sold individually. If you are rebuilding a coilover system, you will need to purchase the appropriate number of springs for your application.

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Specifications

Brand: AST
Part #: AST-100-50-61
UPC: astAST-100-50-61

AST Linear Race Springs - 100mm Length x 50 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 100mm Length x 50 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-100mm-length-x-50-n-mm-rate-x-61mm-id-single-t14-329687
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 ID coilover systems.
Linear spring rate of 50 N/mm offers consistent damping characteristics.
Spring length is 100mm.
Designed for performance and track applications.
Single spring included.

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About this part

Product Details

When you're rebuilding your suspension or looking to fine-tune your coilover setup for track days or spirited driving, the right spring rate is crucial. These AST Linear Race Springs are designed to offer a consistent and predictable response, helping you achieve the handling characteristics you're after. The 50 N/mm rate offers a firm but manageable spring stiffness, suitable for a wide range of performance applications where precise control is needed.

Crafted with durability in mind, these springs are built to withstand the rigors of performance driving. The 100mm length and 61mm inner diameter are standard dimensions, making them a popular choice for many coilover systems. Choosing the correct spring rate can significantly impact your vehicle's cornering ability and overall feel, and this 50 N/mm option provides a solid foundation for improved suspension performance.