Wilwood 170-17862 Lug Drive Dynamic Disc Brake Rotor Hat

The Wilwood 170-17862 Lug Drive Dynamic Disc Brake Rotor Hat features Wilwood's advanced Lug Drive Dynamic mounting system — a rotor attachment design that eliminates traditional rotor bolts entirely. Instead of rigid fasteners, this system allows the rotor to float independently on the hat, moving freely as it expands and contracts through heat cycles. The result is a cleaner thermal response, a truer-running rotor, and a more consistent braking experience under repeated high-heat conditions.

Key Features:

• Bolt-free rotor mounting: Eliminates rotor bolts and all associated thermal stress at attachment points, keeping rotors flatter and running truer
• Spring-loaded stainless steel lug-drive inserts: Replaceable inserts in each lug-drive slot protect the aluminum hat from wear caused by brake torque loading
• Single snap-ring rotor retention: A large, single snap-ring (7.18" diameter) secures the rotor to the hat for fast, tool-free assembly — no torque wrench or safety wire required
• 5 x 4.50" / 4.75" / 5.00" wheel stud bolt patterns: Multi-pattern compatibility for added versatility across applications
• 1/2" wheel stud hole size
• Drilled rotor compatibility: Designed for use with Wilwood's 11.25" diameter x 0.35" thick drilled stainless alloy rotors, which are additionally drilled to minimize rotating mass
• Precision-machined aluminum construction: Lightweight alloy hat resists distortion from thermal cycling, eliminating the bolt-hole alignment issues common with repeated rotor replacement on conventional hats

The Lug Drive Dynamic system removes all thermally generated stress from the rotor attachment points, eliminating pad knock-back, rotor drag, and the distortion that degrades brake pedal feel over time. Consistent brake response is maintained across the full range of operating temperatures — making this hat an ideal choice for performance street, road race, and drag racing brake builds that demand both reliability and minimal unsprung weight.