Understanding Motorcycle Brake Pad Compounds: HH vs. GG

When choosing replacement brake pads, you'll often see two-letter designations like "HH" or "GG." These refer to the friction rating of the brake pad compound—an important factor that affects how your motorcycle brakes perform under different conditions.

What Do HH and GG Mean?

Brake pads are rated using the SAE J866 friction code, which uses letters to indicate the level of friction the pads produce at low and high temperatures.

• The first letter shows friction when cold
• The second letter shows friction when hot

HH Brake Pads

• High friction when both cold and hot
• Strong, aggressive braking performance
• Common on sport and performance bikes
• Usually made from sintered metal compounds

Pros:

• Excellent stopping power
• Performs well in all weather
• Resists fade under hard braking

Cons:

• Can wear rotors faster
• May create more dust and noise

GG Brake Pads

• Moderate friction when cold and hot
• Smoother, more progressive braking
• Common on cruisers, commuters, and touring bikes
• Often organic or semi-metallic materials

Pros:

• Quieter and smoother
• Gentler on rotors
• Ideal for casual or long-distance riding

Cons:

• Less initial bite
• Can fade under hard or repeated braking

Mixing HH and GG Pads Front and Rear

Yes, you can mix compounds between the front and rear brakes—as long as the pads on each individual caliper match. Mixing can help you fine-tune your bike’s braking feel.

Choosing the Right Pads