StopTech 141.61145 AeroHat Brake Rotor Center Hat

The StopTech 141.61145 is a replacement aluminum AeroHat rotor center hat designed for use with StopTech AeroRotor and Big Brake Kit systems. StopTech AeroHats are precision-machined from aircraft-grade aluminum and serve as the mounting interface between the brake rotor friction ring and the wheel hub.

Key Features:

• Aircraft-grade aluminum construction — lightweight design reduces unsprung and rotational mass for improved acceleration, deceleration, and handling
• Directional stand-offs engineered to optimize cooling airflow to the outer face of the rotor
• Floating rotor compatibility — oval-slotted drive pin holes allow the iron rotor to expand radially under heat independently of the aluminum hat, preventing coning and stress cracking
• Reduced thermal stress — the floating design accommodates the different expansion rates of iron and aluminum, extending component life and maintaining consistent pedal feel
• Compatible with StopTech AeroRotor and Big Brake Kit assemblies using the 141-series hat specification
• Manufactured to StopTech's precision quality standards

StopTech AeroHats are a direct replacement for worn or damaged center hats in existing StopTech brake systems. It is recommended to replace rotor mounting hardware whenever the rotor friction ring is replaced to ensure proper fit, float, and long-term reliability.