What does the spring rate (400 lb/in) mean?

The spring rate indicates how much force is needed to compress the spring by one inch. A 400 lb/in spring requires 400 pounds of force to compress it by 1 inch. This rate affects how the suspension handles bumps and body roll.

What size coilover body does this spring fit?

This spring is designed for coilovers with a 2.5-inch inner diameter body. It's important to ensure this matches your existing or intended coilover setup for proper fitment.

Does this spring come with any hardware?

This listing is for the coilover spring only. Any necessary hardware, such as spring perches or adjusters, would typically be part of the complete coilover assembly and are not included with this individual spring.

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: FOX
Part #: 039-10-400-A

Fox Coilover Spring 10.000 TLG X 2.500 ID X 400 lbs/in. Silver

Name: Fox Coilover Spring 10.000 TLG X 2.500 ID X 400 lbs/in. Silver
Brand: FOX
SKU: fox-fox-coilover-spring-10-000-tlg-x-2-500-id-x-400-lbs-in-silver-t14-178877
Price: 101.00 USD
Availability: BackOrder

$101.00

On Backorder

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

Fox Coilover Spring 10in length, 2.5in ID, 400 lb/in rate. Silver finish.

Key Features

This product is a single Fox coilover spring.
The spring measures 10 inches in length.
It has an inner diameter of 2.5 inches.
The spring rate is 400 pounds per inch.
The spring features a silver finish.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

This listing is for a single Fox 10-inch long, 2.5-inch inner diameter coilover spring. It's rated at 400 pounds per inch, meaning it will compress 1 inch under a 400-pound load. The spring comes in a silver finish.

This spring is designed to work with 2.5-inch diameter body coilovers. The 400 lb/in rate is a common choice for many performance applications, offering a noticeable improvement in handling and body control over stock suspension without being overly stiff for daily driving. Fox is well-known for its suspension components, and this spring is built to their standards.