A caliper is the main part of a rim or disc brake system that squeezes the pads. In rim brakes, it is the U-shaped metal arm that straddles the tire. In disc brakes, it is the block mounted near the wheel center that holds the pads.
When you pull the brake lever, the caliper uses mechanical or hydraulic force to close. This action creates the friction needed to slow down or stop the bicycle completely. High-quality calipers are designed to be stiff so they do not flex under heavy pressure. This ensures your brakes feel snappy and provide predictable stopping power every time. They must be aligned perfectly to prevent the pads from rubbing and making noise.
For example, a road cyclist pulls their brake lever, causing the caliper to squeeze the rim tightly. This allows them to slow down safely before entering a sharp corner on a fast descent. It is the powerhouse of your bike’s stopping system.
Discover more from PlayTerms | Simple Sports Terms & Definitions.
Subscribe to get the latest posts sent to your email.