What is the difference between linear and progressive springs?

Linear springs have a constant spring rate, meaning the force they exert increases at a steady pace as they are compressed. Progressive springs have a rate that changes, typically becoming stiffer as they compress further.

What does a 110 N/mm spring rate mean for my car's handling?

A 110 N/mm rate is considered moderately stiff. It will reduce body roll during cornering and improve responsiveness compared to softer stock springs, leading to a more planted feel.

Are these springs sold individually or as a set?

These AST Linear Race Springs are sold individually. You will need to purchase the required quantity for your specific application.

Specifications

Brand: AST
Part #: AST-150-110-61
UPC: astAST-150-110-61

AST Linear Race Springs - 150mm Length x 110 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 150mm Length x 110 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-150mm-length-x-110-n-mm-rate-x-61mm-id-single-t14-329799
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.

AST Linear Race Springs: 150mm length, 110 N/mm rate, 61mm ID. Ideal for performance builds needing precise spring rates.

Key Features

Linear spring design offers consistent force application throughout travel.
110 N/mm spring rate provides a moderately stiff suspension response for improved body control.
150mm length is suitable for a wide range of coilover applications.
61mm inner diameter fits many popular performance coilover systems.
Constructed from well-built steel for durability and consistent performance.

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About this part

Product Details

With a 110 N/mm spring rate and a 150mm length, these AST Linear Race Springs are built for vehicles where precise suspension control is key. The 61mm inner diameter is a common size for many performance coilover setups, making it a versatile choice for builders looking to fine-tune their suspension's response. Linear springs offer a consistent force increase throughout their travel, meaning the further they compress, the more resistance they provide in a predictable manner. This predictability is crucial for setting up a car that handles predictably under load, whether you're on the track or pushing your car on spirited drives.

These springs are constructed from well-built steel, designed to withstand the rigors of repeated compression and extension without losing their intended rate. The 150mm length offers a good balance for many suspension designs, allowing for adequate travel while maintaining a compact profile. When choosing springs for a performance application, selecting the correct rate is paramount; 110 N/mm is a moderately stiff rate that can significantly improve body control and reduce unwanted roll during cornering, especially when paired with appropriate damping. This makes them a solid option for those rebuilding or upgrading their coilover systems for improved handling characteristics.