What is a linear spring rate?

A linear spring rate means that for every millimeter the spring is compressed, it exerts the same amount of force. This results in predictable suspension behavior, which is beneficial for performance driving.

What does the 45 N/mm rate mean for my car?

A 45 N/mm spring rate is considered moderately stiff. It will make your suspension feel more responsive and reduce body roll during cornering compared to softer springs, making it a popular choice for track or performance street use.

Will this spring fit my existing coilovers?

This spring has a 61mm inner diameter, which is a common size for many aftermarket coilover systems. It's important to verify that your coilover bodies are designed to accept a 61mm ID spring before purchasing.

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Specifications

Brand: AST
Part #: AST-200-45-61
UPC: astAST-200-45-61

AST Linear Race Springs - 200mm Length x 45 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 200mm Length x 45 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-200mm-length-x-45-n-mm-rate-x-61mm-id-single-t14-329842
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.
It measures 200mm in length.
The spring rate is 45 N/mm, offering a moderately stiff suspension response.
The inner diameter is 61mm, a common size for many coilover systems.
Linear spring design provides consistent force throughout compression.

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About this part

Product Details

When you're building or rebuilding a performance suspension setup, especially coilovers, the spring rate is a critical piece of the puzzle. This AST Linear Race Spring offers a 45 N/mm rate, which is a moderately stiff spring rate suitable for track-focused vehicles or those looking for a more responsive feel on the street. The 200mm length and 61mm inner diameter are common dimensions, making it a versatile choice for many coilover applications.

Linear springs like this one maintain a consistent force throughout their compression. This means the suspension's response is predictable, which is essential for handling at the limit. AST is known for well-built suspension components, and these springs are made to handle the demands of spirited driving and track use. They are designed to work with many common coilover bodies that accept a 61mm ID spring.