Brake Pad Part No: 15C-4721K


High-Temperature Racing Pads

Pad#: 7620
Compound: PolyMatrix C
Prod #: 15C-4721K
Price: $172.00
PolyMatrix C
PolyMatrix C Coming Soon
Pad Dimensions
Thickness(in) .79
Area(in²) 5.64
Volume(in³) 3.5
Bedded N
UPC Number
UPC 889545036275
Dust & Noise Ratings
Dust Production Rating
Pad Noise Rating
WARNING: Cancer and Reproductive Harm
www.P65Warnings.ca.gov
WARNING: Cancer and Reproductive Harm
www.P65Warnings.ca.gov

PolyMatrix C Compound

Pad 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.

Pad Applications

  • 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.

Rotor Material

PolyMatrix C Performance Stats PolyMatrix C Performance Stats
PolyMatrix C Friction Coefficient and Temperature Values PolyMatrix C Friction Coefficient and Temperature Values Zoom Image

The above friction data (μ) was recorded through braking cycles from 95 mph to 40 mph at a 0.5g deceleration. Snubs were consecutively done until rotor temperature reached 1300°F. This graph represents average data and is for general trend visualisations only comparing Wilwood pads. Chart data should not be used in comparison with other manufacturer's data. Test conditions, variables, and environment can affect test results.

Temperature range and overall friction value are the primary considerations for pad selection. The pads must maintain the proper amount of friction for stopping power within the temperatures that will be realized on the track. Overall wear rate must also be considered. For most asphalt and road race applications, compounds in the high-temperature range over 1000°F 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, improved cooling, a heavier rotor, or a higher temperature range pad may become necessary.

Wilwood Compatible Caliper(s) for Pad #7620

Billet IR-GT
Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 2.02 2.49
Pad Area Range (in²) 5.64
Pad Volume Range (in³) 3.5
Max Rotor Widths (in) 1.25
Max Rotor Diameters (in) 12.19

Billet IR-GT Calipers

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

 
All images shown are for illustrative purposes only. Actual product received may be different than what is portrayed on the web site.
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Version: 3.05 June 23, 2023