Swift Springs Expands BP Spring Lineup with Three New 18-Inch x 5-Inch Spring Rates

Swift Springs is proud to announce the expansion of its 18-inch x 5-inch Bullet Proof (BP) spring lineup with the introduction of three new spring rates: 80 lb/in, 100 lb/in, and 125 lb/in. Developed in response to racer demand, these additions provide more suspension tuning options while delivering the durability and consistency of Swift's proprietary HS5.TW Bullet Proof material.

Built from Swift's Exclusive HS5.TW Bullet Proof Material

For years, Swift Springs has offered the 80 lb/in and 100 lb/in rates in its standard HS5.TW material. As racing applications continued to evolve, teams requested these popular rates in Swift's Bullet Proof (BP) construction to better withstand higher spring loads and increased suspension travel.

Swift answered that call.

Manufactured from Swift's exclusive HS5.TW Bullet Proof material, these new springs are engineered to maintain consistent performance under demanding racing conditions while providing the durability required for today's high-load suspension setups.

Because Swift Springs develops and manufactures its own proprietary spring steel in-house, every BP spring is engineered with precise material characteristics to maximize strength, consistency, and long-term performance.

Introducing a New 125 lb/in Spring Rate

Joining the lineup is an all-new 125 lb/in spring rate, developed specifically for Pro Late Model and Super Late Model asphalt racing applications.

This new rate gives racers and chassis builders another valuable tuning option, helping teams fine-tune suspension balance and optimize handling across a variety of track conditions.

Whether you're looking for improved compliance, greater chassis stability, or more setup flexibility, the new 125 lb/in spring expands the possibilities for competitive asphalt racing programs.

New Spring Rates Available

Swift's expanded 18-inch x 5-inch BP lineup now includes:

80 lb/in

100 lb/in

125 lb/in

Key Features

18-inch free length

5-inch outside diameter

Manufactured from proprietary HS5TW Bullet Proof material

Designed for higher loads and increased suspension stroke

Precision-engineered for consistent performance

Ideal for Pro Late Model and Super Late Model asphalt racing applications

Available Now

The new 80 lb/in, 100 lb/in, and 125 lb/in BP springs are currently in stock at Swift Springs and are shipping to authorized dealers nationwide.

At Swift Springs, every new product starts with racer feedback. By listening to competitors and continuously expanding our suspension lineup, we're able to provide innovative spring solutions that help teams maximize performance and stay competitive throughout the racing season.

When racers ask, Swift Springs delivers.