Friday, December 09, 2016
Brake Pad Part No: 15C-4721K-B

Brake Pad Guide Brake Pads Chart

Brake Pads
High-Temperature Racing Pads

Pad#:   7620
Compound:   PolyMatrix C
Wilwood Brake Pad Plate #7620

Wilwood Brake Pad Plate #7620
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Product Number: 15C-4721K-B     Price: $235.01
Pad Dimensions
Thickness(in): Area(in²): Volume(in³): Beded:
.79 5.64 3.5 Y
Temperature & Friction Ratings
Peak Temperture Rating: Peak Friction Rating:
1300+ F. 0.57
Dust & Noise Ratings
Dust Production Rating: Pad Noise Rating:
N-A N-A

Performance Characteristics
  • Medium-high friction, soft medium temp response, often used as a biasing pad in rear.
  • Gentle rise to a flat torque curve
  • Low wear rate.
  • Medium-high friction, soft medium temp response, often used as a biasing pad in rear.

Vehicle Applications
Driving EnvironmentVehicle Sub-TypesApplication Duty
Rally Heavy Duty
Road Race Heavy Duty
Late Model Asphalt ASA, All Pro, SW Tour, etc...Heavy Duty
Stock Cars NASCAR, BGN, CTS, ARCA, etc... Heavy Duty
Late Model Dirt STARS, UMP, IMCA, etc...Heavy Duty
Northeast Modified Dirt or PavementHeavy Duty
Open Wheel Sprint, Midget, etc… Dirt or PavementHeavy Duty
Off Road Heavy Duty

Pad Illustration and Dimensions
Wilwood Brake Pad Plate #7620 Large Drawing

Wilwood Brake Pad Plate #7620 Large Drawing


Compound Characteristics
PolyMatrix C

PolyMatrix C


Compound Data Sheet
Application:

  • Race ONLY compound commonly used to reduce bias against A, B, or H compounds when additional hydraulic adjustments are not available.
  • Use on any lightweight vehicle, including dirt applications, with high mechanical advantage brakes to prevent wheel lock-up in marginal traction conditions.
Characteristics:

  • Medium to medium high friction compound with soft middle temperature response and a gradual rise to a flat torque curve as temperatures increase.
  • Long wear rate for severe duty, sustained high temperature braking .
  • Reduced friction alternative to B.
Compound Temperature Range & Torque Values
Temperature range and overall friction value are the primary considerations for pad selection. The pads must be capable of maintaining the proper amount of friction for stopping power within the temperatures that will be realized on the track during the event. Then, overall wear rate must be considered. For most asphalt and road race applications, compounds in the high temperature ranges over 1000°F range are usually necessary. Dirt track, drag race, and street performance applications usually operate at temperatures between 500° and 1000°F. Keep in mind that these are general ranges, and not absolute values. Many factors and unforeseen influences can affect brake temperatures. The best indicator for pad selection will always be on track performance. If pad fade (friction loss) due to overheating occurs, then improved cooling, a heavier rotor, or a higher temperature range pad may all become necessary.

Wilwood Compatible Calipers: Pad # 7620
Billet IR-GT
Wilwood Billet IR-GT Caliper

Wilwood Billet IR-GT Caliper
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Billet IR-GT Caliper

The IR-GT4R Radial Mount Caliper is a rigid, lightweight, four piston radial mount design. With smaller piston volumes and thick pad capability, it is suited for a variety of rear brake applications. View IR-GT Calipers
Caliper Dimensions
Piston Count: Piston Area Range (in²): Pad Area Range (in²):
4 2.02 2.49 5.64
Pad Volume Range (in³): Max Rotor Widths (in): Max Rotor Diameters (in):
3.5 1.25 12.19