Swift Springs Expands 1.5" Linear Round Wire Bump Spring Line with Three New Rates

As chassis setups continue to evolve, racers need more tuning options to stay competitive. That's exactly why Swift Springs has expanded its 1.5-inch Linear Round Wire Bump Spring lineup, introducing three new spring rates designed specifically for the rear suspension of Pavement Super Late Models.

The new 400, 500, and 600 lb/in rates give racers additional setup flexibility while maintaining the precision, consistency, and durability Swift Springs is known for. Whether you're fine-tuning rear suspension behavior or adapting to changing track conditions, these new bump spring options provide another valuable tool for maximizing performance.

New 1.5" Linear Round Wire Bump Spring Rates

The newest additions to the lineup include:

• SBS0400 SH – 400 lb/in
• SBS0500 SH – 500 lb/in
• SBS0600 SH – 600 lb/in

Designed with Pavement Super Late Model applications in mind, these shorter bump springs provide racers with more options for dialing in rear suspension characteristics without compromising consistency or durability.

As race teams continue to refine chassis packages, having additional spring rates available makes it easier to match suspension performance to varying track conditions and setup preferences.

Engineered with Swift Springs HS5.TW Material

Like every Swift Springs product, these new bump springs are manufactured using Swift's proprietary HS5.TW spring steel, produced entirely in-house.

By controlling both metallurgy and manufacturing, Swift Springs ensures exceptional consistency from spring to spring. That translates into predictable performance, repeatable setups, and the confidence racers expect when every adjustment matters.

Unlike many manufacturers that source spring material externally, Swift Springs develops its springs from the material up—helping deliver the precision serious racers demand.

Why a 1.5-Inch Bump Spring?

The 1.5-inch Linear Round Wire Bump Spring was engineered for racers looking for an extremely compact bump spring package without sacrificing true linear spring behavior.

Benefits include:

• Three new tuning rates for additional setup flexibility
• Compact 1.5-inch overall length
• True linear spring characteristics
• Designed specifically for rear suspension applications
• Manufactured using proprietary HS5.TW material
• Built for the demands of Pavement Super Late Model racing

These additional rates give teams another level of adjustability when optimizing rear suspension performance throughout changing track conditions.

Continuing to Deliver What Racers Ask For

One of the strengths of the Swift Springs product lineup is that it continues to evolve alongside racers' needs.

The addition of the 400, 500, and 600 lb/in rates expands the existing 1.5-inch bump spring lineup, giving teams even more options to fine-tune their setups without changing to a completely different spring platform.

As suspension technology continues to advance through 2025 and into 2026, having a wider range of bump spring rates allows racers to stay ahead of changing chassis combinations while maintaining the consistency that Swift Springs products are known for.

The new springs are currently shipping to authorized Swift Springs dealers. Contact your local dealer today to add these latest rates to your setup arsenal.

Explore More Swift Springs Bump Spring Resources

This release is part of our growing Swift Springs Bump Springs resource series, where we cover new product releases, setup insights, and technical information to help racers better understand how bump springs influence chassis performance.

Whether you're comparing spring rates, learning about different bump spring lengths, or looking for the latest additions to the Swift Springs lineup, our resource library is designed to help racers make informed suspension decisions.

Swift Springs — The Science of Winning. Built by racers, engineered through metallurgy, and continuously developing innovative spring technology to help competitors find speed every time they hit the track.