Wilwood 170-13136 Big Brake Flared Bell Dynamic Bobbin Mount Disc Brake Rotor Hat

The Wilwood 170-13136 is a Big Brake Flared Bell Dynamic Bobbin Mount disc brake rotor hat, engineered for high-performance street and racing applications where thermal management and rotor stability are critical. Wilwood's Dynamic Bobbin Mount system uses a patented rotor mounting design that allows the rotor to float and move independently of the hat as it expands and contracts through repeated heat cycles.

Key Features:

• Dynamic Bobbin Mount System: Allows the rotor to expand and contract freely, removing all thermally generated stress from the rotor attachment points
• Flared Bell Construction: Big brake flared bell design provides increased clearance and optimized geometry for large-diameter rotor setups
• Improved Rotor Flatness: Rotors stay flatter and run truer, maintaining consistent contact with brake pads throughout their service life
• Consistent Brake Response: Eliminates thermal distortion-related changes in pedal feel and brake response
• Eliminates Pad Knock-Back and Rotor Drag: Floating rotor interface prevents the hat from distorting under thermal stress, resolving common issues associated with rigidly mounted rotors
• Precision Machined Aluminum Alloy: Lightweight, high-strength construction suited for performance and racing environments

The Wilwood 170-13136 Dynamic Bobbin Mount hat is an ideal upgrade for builds requiring a floating rotor setup, delivering improved braking consistency, longer component life, and elimination of thermal distortion problems common to fixed-mount rotor hat designs.