There are several common problems that can occur with bike brakes. Here are a few examples:
Squeaking or squealing: Brakes may produce a high-pitched noise when applied, which can be caused by various factors such as dirty brake pads, glazed brake pads or rotors, misalignment, or improper toe-in adjustment. Squeaking brakes can be an indication of a problem that requires attention.
Poor braking performance: If the brakes feel weak or have reduced stopping power, it could be due to worn brake pads, contaminated brake pads or rotors (e.g., oil, grease, or dirt), air in the brake system, misalignment, or a worn-out brake cable. Insufficient brake performance should be addressed promptly for safety reasons.
Dragging brakes: Dragging brakes occur when the brake pads do not fully retract from the rotor after releasing the brake lever or pedal. This can lead to increased friction and heat, causing premature wear and reduced performance. Dragging brakes can be caused by issues such as misaligned calipers, sticky pistons, or a misadjusted brake cable.
Soft or spongy brake lever/pedal: If the brake lever or pedal feels soft or spongy and has excessive travel, it may indicate air in the brake system or a problem with the hydraulic brake fluid. Air in the system can cause a loss of brake performance and should be addressed by bleeding the brakes or inspecting the hydraulic system.
Vibration or pulsation: If you experience a pulsating sensation or vibration when applying the brakes, it could be a sign of a warped brake rotor. Warped rotors can occur due to excessive heat, improper installation, or aggressive braking. In such cases, the rotors may need to be resurfaced or replaced.
Brake fade: Brake fade refers to a loss of braking power or reduced effectiveness over continuous or heavy use. It can be caused by overheating of the brake components, such as the brake pads or rotors. It is important to allow the brakes to cool down to regain their performance and avoid potential safety hazards.
If you encounter any issues with your bike brakes, it is recommended to have them inspected and serviced by a qualified bicycle mechanic to ensure proper functioning and maintain safety while riding.