Skyjacker 176DR 6in Dual Rate Coil Springs for 66-79 Ford F100/F150/Bronco 4WD

Vehicle Fitment

• 1966-1976 Ford F-100, 4WD
• 1976-1979 Ford F-150, 4WD
• 1978-1979 Ford Bronco, 4WD

Fitment Notes

• Front coil springs only, sold as a pair
• Straight bolt-on, direct-fit installation - simple remove and replace of the factory front coils
• Distinct from Skyjacker's standard single-rate Softride spring line - this is the Dual Rate (DR) long-travel version, engineered specifically for increased articulation
• 6-inch lift height - the tallest option in this DR series for the 66-79 F100/F150/Bronco platform, above the 172DR (2 in.) and 174DR (4 in.)

Features

• 2-stage dual rate long-travel design, with spring rate progressing from a first "Flex Rate" to a second "Ride Rate"
• First Flex Rate stage delivers a comfortable ride with the ability to flex and expand during full articulation, keeping the coil seated at the upper coil mount and tires in contact with the terrain
• Second Ride Rate stage engages after compression progresses past the Flex Rate, providing firmer support as the suspension loads up
• Constructed from SAE9254 spring steel, using an advanced shot peening process and a presetting process for consistent, long-lasting spring rate
• Precision-engineered progressive variable rate delivers vigorous off-road handling without sacrificing smooth street ride characteristics
• Engineered to maintain proper OEM suspension geometry

Specifications

• Part Number: 176DR
• Brand: Skyjacker
• Product Line: Dual Rate Long Travel Coil Springs
• Position: Front
• Lift Height: 6 in.
• Spring Type: 2-Stage Dual Rate (Progressive Variable Rate)
• Material: SAE9254 Spring Steel
• Quantity: Pair

Included Components

• 2x Front Dual Rate Long Travel Coil Springs

Product Description

The Skyjacker 176DR is a 6-inch front coil spring pair engineered for 1966-1976 Ford F-100, 1976-1979 Ford F-150, and 1978-1979 Ford Bronco 4WD trucks running serious off-road lift. Rather than a standard single-rate spring, Skyjacker built this as a true 2-stage dual rate long-travel coil, with spring rate progressing from an initial Flex Rate through to a firmer Ride Rate as suspension travel increases.

That dual-rate design serves a specific purpose: the Flex Rate stage lets the coil expand and flex during full articulation, keeping it properly seated at the upper coil mount and helping the tires stay planted on uneven terrain, while the Ride Rate stage engages once compression progresses further, delivering firmer support under load. Construction starts with SAE9254 spring steel, refined through an advanced shot peening process and presetting to maintain consistent spring rate over the long term.

Engineered to maintain proper OEM suspension geometry, this spring installs as a straightforward bolt-on, direct-fit replacement for the factory front coils. As the top of Skyjacker's dual-rate lineup for this platform - above the 2 in. 172DR and 4 in. 174DR - the 176DR is built for owners running larger tires and wanting maximum articulation without sacrificing street-driving comfort.