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Product details
A 1.710-inch-offset Wilwood rear drag hat joins an eight-bolt rotor to the specified multi-pattern hub flange. Check register and bolt clearance. Founded by Bill Wood in 1977, Wilwood Engineering designs and manufactures disc brake systems from Camarillo, California. Its calipers, brake rotors, master cylinders, valves, fittings and brake lines serve motorsport, street-performance and specialized applications. Individual components must be selected for the complete brake system.
Technical Details
- Manufacturer part number: 170-0259
- Component: Drag Brake Rotor Hat
- Material: Aluminum
- Surface finish: Black E-Coat
- Rotor mounting method: Fixed Mount
- Position in the specified brake assembly: Rear
- Hat offset: 1.710 inch
- Rotor attachment interface: 8 x 7.00 inches; rotor attachment, separate from the hub flange
- Hub-flange mounting/clearance pattern(s): 5 X 4.50, 5 X 4.75, 5 X 5.00 inches; verify the actual hub and wheel-stud clearance
- Center register diameter: 3.06 inches
- Rotor mounting hole/thread designation: 5/16-18
- Internal clearance diameter: 6.14 inches
- Mounting-face thickness: 0.25 inches
- Hub-side hole clearance diameter(s): 0.520 inches; these are clearance dimensions, not wheel-stud thread sizes
- Manufacturer-listed attachment hardware reference: 230-0233D; verify the specific rotor and attachment arrangement before ordering hardware
- Rotor-bolt clearance: The listed 230-0233D kit uses short-profile hex-head bolts for the solid-rotor drag assembly. Use 230-2589 only where the installation provides sufficient clearance between the rotor-bolt heads and caliper mounting hardware.
- Manufacturer installation note: 3.06 " diameter register with counterbore for register ring.
Fitment & Compatibility
Use this replacement only within the specified Drag brake systems. Compare the hub, caliper position and rotor attachment to the complete assembly drawing. Select the rotor and attachment hardware separately for the documented assembly. Follow the installation drawing for engagement and clearance at every mounting point.
Manufacturer Reference
Wilwood component specifications and dimensions · Wilwood 230-0233D / 230-2589 hardware-clearance reference
PMB Performance has over 20 years of brake-parts experience. Send the installed component details if you need help checking this replacement.
