What does a linear spring rate mean for my car's handling?

A linear spring rate means the spring compresses at a constant rate throughout its travel. This results in predictable suspension behavior, which is beneficial for performance driving and track use where consistent feedback is important.

How do I know if this 61mm ID spring will fit my coilovers?

The 61mm inner diameter is a common size for many aftermarket performance coilover systems. It's best to measure the inner diameter of your existing springs or consult your coilover manufacturer's specifications to ensure compatibility.

What is the benefit of a 90 N/mm spring rate compared to a stock spring?

A 90 N/mm spring rate is significantly stiffer than most stock springs. This increased stiffness helps to reduce body roll during cornering, improve braking stability, and provide a more direct connection to the road, which is desirable for performance driving.

Specifications

Brand: AST
Part #: AST-220-90-61
UPC: astAST-220-90-61

AST Linear Race Springs - 220mm Length x 90 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 220mm Length x 90 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-220mm-length-x-90-n-mm-rate-x-61mm-id-single-t14-329869
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 requiring a 220mm length, 90 N/mm rate, and 61mm ID coilover spring.
Linear spring rate provides consistent and predictable suspension response.
90 N/mm spring rate offers improved stiffness for better handling and body control.
61mm inner diameter is a common size for many performance coilover applications.
220mm length is suitable for various performance suspension setups.

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About this part

Product Details

When you're rebuilding your suspension or looking to fine-tune your vehicle's handling for track use, selecting the right coilover spring is crucial. This AST Linear Race Spring is designed for performance applications where precise spring rates and consistent damping are key. Its linear rate means the spring compresses at a constant rate, providing predictable feedback through the suspension travel.

This particular spring measures 220mm in length with a 90 N/mm spring rate and a 61mm inner diameter. The 90 N/mm rate offers a significant increase in stiffness over stock springs, which can improve body control during hard cornering and braking. The 61mm inner diameter is a common size for many performance coilover systems, making it a versatile option for custom builds or replacements. AST is known for well-built suspension components, and these springs are made to handle the demands of spirited driving and track days.