What is a linear spring rate?

A linear spring rate means the spring's resistance to compression increases at a constant rate. For every millimeter the spring is compressed, the force increases by 340 Newtons. This provides predictable handling characteristics.

What does the 61mm ID refer to?

ID stands for Inner Diameter. The 61mm measurement indicates the diameter of the hole in the center of the spring. This is important for ensuring the spring fits correctly onto your coilover shock absorber body.

Are these springs sold individually?

Yes, this listing is for a single linear race spring. If you need a set for your vehicle, you will need to purchase the appropriate quantity.

FEATURED BRAND = COVERKING CHECK OUT COVERKING NOW →

Questions? Call Us:631-982-0042

M-F 8AM-4PM ET

Trusted Since 1957

Est. 1957

Specifications

Brand: AST
Part #: AST-120-340-61
UPC: astAST-120-340-61

AST Linear Race Springs - 120mm Length x 340 N/mm Rate x 61mm ID - Single

Name: AST Linear Race Springs - 120mm Length x 340 N/mm Rate x 61mm ID - Single
Brand: AST
SKU: ast-ast-linear-race-springs-120mm-length-x-340-n-mm-rate-x-61mm-id-single-t14-329735
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

Verified fitment for AST coilover systems.
Linear spring rate of 340 N/mm for consistent suspension control.
120mm spring length.
61mm inner diameter fits many coilover shock bodies.
Well-built for performance and track applications.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

AST is known for making performance suspension components, and these linear race springs are a solid option for anyone building or rebuilding a coilover setup. They offer a consistent spring rate of 340 Newtons per millimeter, which is crucial for predictable handling and chassis response. The 120mm length and 61mm inner diameter are standard sizes, making them compatible with many coilover bodies and shock absorbers.

These springs are designed for track use where precise suspension control is important. The linear rate means the spring force increases proportionally with compression, providing a well-behaved response throughout its travel. This predictability helps in tuning the suspension for specific track conditions or driving styles. They are well-built to handle the demands of racing and performance driving.