If a brake fails to completely release after the pressure is removed, it is said to be ______.

• A. Sticking
• B. Seizing
• C. Free-spinning
• D. Dragging

Answer: (D)

Dragging occurs when a brake doesn’t fully release after the hydraulic pressure is removed, so the pads stay in contact with the rotor and continue to rub as the wheel turns. That lingering contact creates friction even without applying the brakes, which slows the wheel and generates heat. This differs from a completely released system (free-spinning), where the wheel moves freely with no pad contact. It’s also different from a sticking condition, where the brake components don’t return properly and may hold or drag intermittently, or from a seizing condition, where the mechanism locks up and can’t move at all.

Dragging can lead to excessive brake heat, uneven pad wear, and potential rotor damage, so it’s a sign that the braking system isn’t returning to a fully open position. Common causes include a seized or sticking piston, sticky caliper slides or pins, contamination or corrosion causing pad binding, or a misadjusted return mechanism. Regular inspection should focus on ensuring smooth caliper movement, clean and lubricated slide pins, and that the pads and rotor surfaces are free of contamination and properly matched in clearance.