Understanding Brake Pad Friction Coefficients: What the Numbers Mean

Every brake pad sold has a friction code stamped on it — letters like FF, GG, or HH. These aren’t random. They tell you exactly how the pad will perform at different temperatures. Understanding these codes can help you choose the right pad for your needs.

The Edge Code System

The friction code consists of two letters. The first represents the normal friction coefficient (at ~200°F/93°C), and the second represents the hot friction coefficient (at ~600°F/316°C).

Friction Code Chart

C = up to 0.15
D = 0.15-0.25
E = 0.25-0.35
F = 0.35-0.45
G = 0.45-0.55
H = over 0.55

What This Means in Practice

FF pads (0.35-0.45 cold and hot): Balanced, consistent performance. Good for daily driving.
GG pads (0.45-0.55): Higher friction, stronger bite. Great for performance street driving.
HH pads (0.55+): Maximum friction. Designed for racing and heavy-duty applications.

Why Consistent Friction Matters

The key isn’t just high friction — it’s consistent friction across temperatures. A pad rated GF (high cold, low hot) will fade dangerously when heated. A pad rated FG (moderate cold, high hot) gets stronger with heat — ideal for aggressive driving.

At Barbaro CAC Racing, our friction compound development is informed by real-world racing data. Every formula is tested across the full temperature spectrum to ensure predictable, linear braking feel from cold start to maximum attack. Browse our pads →