What is a linear spring rate and why is it important for track use?

A linear spring rate means the spring's resistance increases proportionally to how much it's compressed. For track use, this predictability allows for more precise suspension tuning and consistent handling response during cornering and braking.

What does the 61mm ID mean for installation?

The 61mm ID refers to the inner diameter of the spring. This measurement is important to ensure the spring fits correctly onto the body of your coilover shock absorber. Always verify your existing spring's inner diameter matches.

Are these springs sold individually or as a set?

These AST Linear Race Springs are sold individually. If you are replacing springs on a coilover setup, you will typically need two springs per axle, so be sure to order the correct quantity for your application.

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Specifications

Brand: AST
Part #: AST-100-260-61
UPC: astAST-100-260-61

AST Linear Race Springs - 100mm Length x 260 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 100mm Length x 260 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-100mm-length-x-260-n-mm-rate-x-61mm-id-single-t14-329705
Price: 103.36 USD
Availability: BackOrder

$103.36

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Linear spring design for consistent force application.
100mm length.
260 N/mm spring rate for a firm suspension setup.
61mm inner diameter fits many coilover systems.
Built for track and performance driving applications.

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About this part

Product Details

If you're rebuilding or tuning your coilovers for track use, selecting the right spring rate is crucial for handling and responsiveness. These AST Linear Race Springs are built for that purpose, offering a consistent spring rate throughout their travel. The 260 N/mm rate provides a firm setup, ideal for drivers who want improved feedback and control on the track or during spirited driving.

These springs measure 100mm in length and have a 61mm inner diameter, designed to fit many common coilover applications. The linear spring design means that for every millimeter the spring is compressed, it exerts the same amount of force. This predictability is key for suspension tuning, allowing for more precise adjustments to your vehicle's handling characteristics. They are well-built to withstand the rigors of racing and performance driving.