What is a linear spring rate?

A linear spring rate means that for every inch (or millimeter) the spring is compressed, it exerts the same amount of force. This provides a predictable and consistent feel to the suspension's response.

What does the 61mm ID refer to?

ID stands for Inner Diameter. This measurement indicates the diameter of the coilover shock body or perch that the spring will fit onto. It's important to ensure this matches your existing coilover setup.

What is the difference between linear and progressive springs?

Linear springs have a constant rate of force increase as they compress, offering a predictable feel. Progressive springs have a rate that changes, typically becoming stiffer as they are compressed further, which can offer a softer initial ride with firmer support during hard cornering.

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Specifications

Brand: AST
Part #: AST-220-45-61
UPC: astAST-220-45-61

AST Linear Race Springs - 220mm Length x 45 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 220mm Length x 45 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-220mm-length-x-45-n-mm-rate-x-61mm-id-single-t14-329860
Price: 103.36 USD
Availability: BackOrder

$103.36

On Backorder

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Key Features

Fits vehicles with 61mm ID coilover systems.
Linear spring rate of 45 N/mm offers consistent suspension response.
Spring length is 220mm.
Single spring unit.

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About this part

Product Details

This is a single AST Linear Race Spring, measuring 220mm in length with a spring rate of 45 N/mm and a 61mm inner diameter. These springs are designed for performance applications where a consistent spring rate is crucial for predictable handling and suspension response. The linear rate means the force increases uniformly as the spring is compressed, offering a direct and responsive feel.

AST springs are well-built for demanding use, often found in track-focused or motorsport setups. The 61mm inner diameter is a common size for many coilover systems, making it a versatile option for builders or those looking to replace worn-out springs. When selecting springs, matching the rate to your vehicle's weight and intended use is key for optimal performance and ride quality.