Wilwood 170-17860 Lug Drive Dynamic Disc Brake Rotor Hat

The Wilwood 170-17860 Lug Drive Dynamic Disc Brake Rotor Hat features Wilwood's innovative bolt-free rotor mounting system, engineered to eliminate the thermal stress failures and alignment issues that plague traditional rotor hat designs. By allowing the rotor to float and move independently of the hat through heat cycles, this system delivers superior braking consistency and dramatically extended component life.

Lug Drive Dynamic Mounting System:

• Eliminates rotor mounting bolts — rotors float freely, expanding and contracting through heat cycles without transmitting stress to the hat
• Removes all thermally generated stress from rotor attachment points, keeping rotors flatter and running truer over the life of the component
• Consistent brake response and pedal feel — thermal distortion no longer compromises braking performance
• Eliminates pad knock-back and rotor drag caused by thermally induced rotor warping
• Hat remains distortion-free — no longer subjected to expansion and contraction stresses from the rotor
• Eliminates bolt hole alignment issues when installing replacement rotors on a previously used hat

Construction & Hardware Details:

• Spring-loaded, replaceable stainless steel inserts in each lug-drive slot protect the aluminum hat from wear generated by brake torque loading
• Single large snap-ring retains the rotor in the hat for fast, simple assembly — no torquing or safety-wiring of rotor bolts required
• Precision-machined from lightweight aluminum alloy for high strength and reduced unsprung rotating weight
• Compatible stainless alloy rotors are additionally drilled to remove excess rotating mass from the driveline

The Wilwood 170-17860 is an ideal upgrade for high-performance street, road race, and drag racing applications where thermal management and repeatable braking performance are critical. The tool-free snap-ring assembly makes rotor swaps fast and straightforward, with no special hardware or torque procedures needed.