09/04/2026
🚨 Introducing the ATTACK™ Swingarm Series from Brock's Performance
What happens when you take decades of sportbike drag racing development and point it at the traction problems unique to a Harley-Davidson bagger? You get the ATTACK™ Swingarm.
Every ATTACK™ Swingarm uses an offset pivot design to raise the effective pivot point, increasing attack angle and anti-squat so the rear tire gets driven into the pavement under power instead of unloading as the bike squats. On a sportbike, engineers can just raise the pivot point. On a Harley, the pivot runs straight through the transmission and primary structure, so that option doesn't exist. The ATTACK™ Swingarm builds the same geometry advantage directly into the arm itself, delivering better bite, better chassis attitude under acceleration, and more usable traction whether you're running a stock engine, big-inch, turbo, or nitrous.
Now available in two lengths for Touring Models (09-26):
✴️ Short ATTACK (Stock to +4"): Stronger acceleration with a responsive chassis, built for stock and short wheelbase drag racing, roll-ons, twisties, and land-speed runs.
✴️ Long ATTACK (+4" to +8"): The purpose-built long-bike solution for serious power. Combines offset pivot geometry with added length to help the most demanding drag race, big-inch, turbo, and nitrous applications leave harder, track straighter, and stay calm when the throttle comes in aggressively.
Both versions are built from 6061-T6 aluminum, handcrafted from a proprietary extrusion here in the USA, and share the same bolt-on-friendly design, chromoly axle, PTFE®-lined spherical bearings, and threaded spool mounts. The Short ATTACK™ comes finished in burnished raw aluminum with a 36% weight savings over OEM. The Long ATTACK™ comes finished in black powder coat with a 39% weight savings over OEM.
Less weight. More traction. A chassis that works with you under power instead of against you. That's the ATTACK™ Swingarm.
👉🏼 Learn more at https://bit.ly/BrocksSwingarm
