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.
Wilwood Engineering designs and manufactures high-performance disc brake systems. Since the company’s inception in 1977 by Bill Wood, we have developed a substantial matrix of brake components and engineering techniques that allow us to quickly and reliably create brake systems for almost any application. Our core ability is the rapid development of custom engineered brake systems using a combination of off-the-shelf and custom components. In addition to designing and manufacturing brakes for all types of competitive motor sports, Wilwood also manufactures brake systems and components for agricultural equipment, industrial applications, utility vehicles, snowmobiles, quads, motorcycles and military vehicles.
With headquarters in Camarillo, California, Wilwood employs approximately 250 people. We have on-shelf stock of more than 300 different brake calipers, 200 rotor designs, 100 master cylinder designs and a wide assortment of brackets, fittings, valves and brake lines. Our off-shelf brake calipers range in size from tiny calipers used on go-carts and light duty industrial equipment, to heavy duty original equipment brakes for the U.S. military Humvee.
Wilwood's engineering department uses the latest computer-aided design and manufacturing techniques in conjunction with finite element analysis, dynamic test and cycle test equipment, to find high-performance and reliability solutions for the most difficult braking tasks. Our extensive inventory of proprietary on-the-shelf components allow us to provide cost-effective solutions for unique brake applications.
Wilwood is ISO 9000 compliant and has extensive experience maintaining quality levels of 100ppm or less for original equipment manufacturers.
| Application Info | |
| Application Note | General Drag Applications |
| Hat Bolt Kit Part # | 300-12561 |
| Hat Dimensions | |
| Center Reg. (in) | 3.06 |
| Hat Offset (in) | 1.960 |
| Mount Hole Type | Lug |
| Rotor Bolt Circle (in) | 8Lug-7.18 |
| Additional Hat Dimensions | |
| Clearance I.D. (in) | 6.20 |
| Face Thickness (in) | 0.25 |
| Hat Stud Diamenter - BC 1 (in) | 0.520 |
| Hat Stud Diamenter - BC 2 (in) | 0.520 |
| Hat Stud Diamenter - BC 3 (in) | 0.520 |
| Rotor Mount Hole Size (in) | N/A |
| Hat Type | |
| Finish | Type III Anodize |
| Material | Aluminum |
| Mount Style | Dynamic Lug Mount |
| Weight (lbs) | 1.700 |
| 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 |
