Extra-long, carbon-safe expander plug for 1 1/8" composite steerer tubes

Protect your full-carbon fork from crushing forces while securing precise headset preload with this 52 mm expander plug from FORCE. Traditional star nuts should never be driven into carbon steerer tubes as they can score the fibers and cause catastrophic structural failure. This expander is engineered specifically for 1 1/8" carbon forks, expanding smoothly to distribute clamping forces evenly.

Featuring an extended 52 mm support length, it maximizes internal surface area contact. This provides critical wall reinforcement directly beneath the stem's clamping zone while anchoring the top cap securely. Built as a lightweight yet high-strength solution, it guards against wear and is straightforward to install, making it accessible even for novice mechanics.

• Designed for 1 1/8" Carbon Steerers: Purpose-built to protect delicate composite fork tubes.
• Extended 52 mm Length: Provides maximum contact area and internal wall reinforcement under the stem.
• Carbon Fiber Friendly: Evenly spreads clamping pressure to prevent crushing, cracking, and wear.
• Lightweight & Strong: High structural integrity without adding unwanted grams to your cockpit.
• Simple & Secure Mounting: Quick and easy to install correctly, even for beginner home mechanics.