What is a linear spring rate?

A linear spring rate means that the force required to compress the spring increases at a constant rate. For every millimeter the spring is compressed, the resistance increases by the same amount (100 N/mm in this case). This offers predictable handling.

What does the 61mm ID refer to?

The 61mm ID refers to the inner diameter of the spring. This measurement is important for ensuring the spring fits correctly onto the shock body or perch of a coilover assembly.

Are these springs sold individually or as a set?

This product listing is for a single AST Linear Race Spring. If you are rebuilding a set of coilovers, you will need to purchase multiple springs to match your vehicle's suspension setup.

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Specifications

Brand: AST
Part #: AST-220-100-61
UPC: astAST-220-100-61

AST Linear Race Springs - 220mm Length x 100 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 220mm Length x 100 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-220mm-length-x-100-n-mm-rate-x-61mm-id-single-t14-329870
Price: 103.36 USD
Availability: BackOrder

$103.36

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AST Linear Race Springs: 220mm length, 100 N/mm rate, 61mm ID. Built for performance suspension setups.

Key Features

This is a single AST Linear Race Spring.
The spring rate is 100 N/mm, indicating a firm resistance.
It has an inner diameter of 61mm, a common size for performance coilovers.
The spring length measures 220mm.
Designed for linear spring action, offering predictable compression resistance.

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About this part

Product Details

With a spring rate of 100 N/mm, these AST Linear Race Springs are built for serious suspension tuning. The 61mm inner diameter and 220mm length are common dimensions for performance coilovers, offering a solid foundation for building a custom setup or replacing worn-out springs.

These springs are designed for consistent performance. The linear rate means that as the spring compresses, the resistance increases proportionally, providing predictable handling characteristics. This is crucial for track use or spirited driving where precise suspension feedback is essential. The well-built construction aims to maintain this rate over time, resisting fatigue and ensuring reliable performance.

If you're rebuilding your coilovers or looking to fine-tune your suspension's stiffness, these springs offer a specific rate that can make a notable difference in your vehicle's handling and responsiveness.