What is a linear spring rate?

A linear spring rate means that for every inch the spring is compressed, it exerts the same amount of force. This provides predictable and consistent suspension behavior, which is often preferred for performance driving and track applications.

What does the 70 N/mm rate mean for my car?

A 70 N/mm spring rate is a moderately stiff option. It will offer improved body control and reduced body roll during cornering compared to softer, stock springs. This rate is often chosen for track days or aggressive street driving where a firmer ride is acceptable for better handling.

Is this spring sold individually or as a set?

This specific product listing is for a single AST Linear Race Spring. If you are building or replacing coilovers, you will typically need to purchase multiple springs to complete the set for your vehicle's suspension.

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Specifications

Brand: AST
Part #: AST-220-70-61
UPC: astAST-220-70-61

AST Linear Race Springs - 220mm Length x 70 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 220mm Length x 70 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-220mm-length-x-70-n-mm-rate-x-61mm-id-single-t14-329865
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: Single Spring
Length: 220mm
Spring Rate: 70 N/mm
Inner Diameter: 61mm
Type: Linear Race Spring

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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 70 Newtons per millimeter and a 61mm inner diameter. These springs are designed for performance applications, often used in custom coilover setups where precise suspension tuning is critical. The linear rate means the spring's resistance increases consistently as it's compressed, offering predictable handling characteristics.

AST is known for well-built suspension components, and these springs are no exception. The 70 N/mm rate is a moderately stiff option, suitable for track use or spirited driving where improved body control and reduced roll are desired. The 61mm inner diameter is a common size for many aftermarket coilover bodies, making it a versatile choice for custom builds or replacements. Remember that spring rates are a key factor in how your suspension feels and performs, so choosing the right rate is important for your specific driving needs.