Hat No: 170-12426

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Dynamic Drag Hat - Lug Drive
Prod #: 170-12426
Price: $163.76
Dynamic Drag Hat - Lug Drive 170-12426

Hat Dimensions
Mount Hole Type Lug
Rotor Bolt Circle (in) 8 x Lug
Hat Offset (in) 1.59
Center Reg. (in) 3.06
Hat Type
Material Aluminum
Mount Style Dynamic Lug Mount
Finish Type III Anodize
Weight (lbs) 1.7
Bolt Circle Dimensions
Hat Bolt Circle 1 5 X 4.50
Hat Bolt Circle 2 5 X 4.75
Hat Bolt Circle 3 5 X 5.00
UPC Number
UPC 889545041798
Application Info
Application Note General Drag Applications
Hat Bolt Kit Part # 300-12561
Application Note
Application Note
Dynamic Drag Hat - Lug Drive - Product Description

Wilwood's new Lug Drive Dynamic hats incorporate a new rotor mounting system that eliminates the rotor bolts and allows the rotors to move independently of the hats as they expand and contract through heat cycles. All thermally generated stress is removed from the rotor attachment points. The rotors stay flatter and run truer. Brake response and pedal feel remain consistent. Pad knock back and rotor drag are eliminated. The hats are no longer distorted by stresses generated by thermal expansion and shrinkage of the rotors. All problems associated with thermal distortion, including bolt hole alignment issues when trying to re-install new rotors on a previously used hat, are eliminated.


Spring-loaded, replaceable stainless steel inserts in each lug-drive slot protect the aluminum hat from wear that would otherwise be caused by loading of the stainless steel rotor against the hat when brake torque is applied. A large, single snap-ring retains the rotor in the hat, making assembly and installation literally a snap. There is no longer any need to torque or safety wire rotor mounting bolts. The already lightweight stainless alloy discs are additionally drilled to remove all unnecessary rotating weight from the driveline.




Rotor Hat Dimensions

Additional Hat Dimensions
Rotor Mount Hole Size (in) N/A
Shoe I.D. (in)
Clearance I.D. (in) 6.2
Face Thickness (in) 0.25
Hat Stud Diamenter - BC 1 (in) 0.52
Hat Stud Diamenter - BC 2 (in) 0.52
Hat Stud Diamenter - BC 3 (in) 0.52
Additional Notes
300-12561 Dynamic Lug Mount Clip & Snap Ring kit are required for rotor mounting.

Wilwood Compatible Rotors

Super Alloy Drilled Rotor

Rotor Dimensions
Rotor Diameter Range 11.25 11.44
Rotor Width Range 0.35

Super Alloy Drilled Rotor Rotors

Super Alloy Steel Rotors have applications in all types of motorsports. Steel rotors provide a durable lightweight option in applications where sustained temperatures remain in the low to moderate range, and high heat spikes are only observed on an intermittent basis. This could be anything from a hard stopping drag race car at the end of a quarter mile, or a high speed stock car coming in from a qualifier at a super speedway. Steel rotors can also be found in lighter weight open wheel cars such as sprints and modifieds, and a variety of light weight, open wheel road course racers. A special alloy and proprietary manufacturing processes give these rotors high resistance to thermal distortion with excellent friction and wear characteristics against the pads. View Super Alloy Rotors



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