Swift Springs Introduces the New 950-550-XXX F Front Spring Series for UMP Racing

Swift Springs is proud to announce the release of the new 950-550-XXX F Series, the latest addition to its innovative F Series front spring lineup. Developed in response to overwhelming demand from racers, this new spring series provides UMP competitors and other dirt track racers with another high-performance suspension option designed to improve front-end compliance and overall chassis performance.

Built from Racer Feedback

At Swift Springs, new product development starts at the racetrack. After receiving requests from racers utilizing the 950-550-XXX Series in the right front of their UMP Modifieds, our engineering team developed an all-new front spring that delivers the same race-proven characteristics found throughout the F Series.

The result is the 950-550-XXX F Series—a spring specifically engineered to provide greater suspension control while helping racers fine-tune their shock package for improved performance.

Proven F Series Technology

Like every spring in the Swift F Series, the new 950-550-XXX F utilizes a reduced coil count to slow the spring's opening speed during suspension rebound.

By controlling spring extension more effectively, racers can reduce rebound damping in the shock absorber, allowing the suspension to react more freely to changing track conditions. The result is improved compliance, better tire contact, and increased grip throughout the race.

This unique spring design gives chassis tuners another valuable tool for optimizing suspension performance without sacrificing consistency.

Available Spring Rates

The new 950-550-XXX F Series is initially available in the following rates:

400 lb/in

450 lb/in

500 lb/in

550 lb/in

600 lb/in

Additional heavier spring rates are already in development to support racers competing in Stock Car and Super Stock classes.

Key Features

New 950-550-XXX F Series front springs

Designed for UMP Modified and similar dirt track racing applications

Reduced coil count to control spring opening speed

Allows reduced rebound settings for improved suspension compliance

Enhances tire contact and chassis performance

Initial spring rates from 400–600 lb/in in 50 lb increments

Additional heavier rates coming soon for Stock Car and Super Stock racers

Available Now

The new 950-550-XXX F Series is available now through Swift Springs and authorized dealers nationwide.

Driven by racer feedback and engineered with Swift's commitment to innovation, this new spring series delivers another suspension tuning option for competitors looking to maximize grip, improve compliance, and gain a competitive advantage on the track.

As always, Swift Springs continues to develop race-winning suspension technology built by racers, for racers.