As a result, the inside brake pad does most, if not all, of the braking. When the pins are seized, the outboard pad does not slide fully into contact with the rotor. The friction between the two pads causes the vehicle to stop. After the inboard pad contacts the rotor, the caliper slides or pulls the outboard pad into contact with the other side of the rotor. They contain a single piston that moves the inboard pad into contact with one side of the brake rotor.
Instead, they float on the guide pins bolted to the anchor bracket fastened to the steering knuckle. 4 It modulates the front brake force in real time, based on the road surface and rider weight position, and avoids front wheel lockup accidents when applying the front brake. In addition, high-temperature graphite or synthetic lubricant reduces friction from metal-to-metal contact.įloating calipers are not mounted directly to the steering knuckle or suspension component. Slidepad is an Intelligent Brake Distribution (IBD) technology, aimed at making braking easier for novice or casual cyclists, integrates into V-brake systems to provide single-lever braking. Instead, most manufacturers recommend synthetic lubricants made for brake systems, like silicone or PAG. Many slide pins have a rubber bushing or O-ring around the stem to locate and fit the pin snug in its bore.Īvoid petroleum lubricants that swell rubber parts. Grinding off the finish leaves the pin susceptible to pitting and excessive wear. Guide pins are lubricated with synthetic brake grease and fit into a bore at each end of the caliper's anchor bracket. A replacement caliper or a kit containing pins and sleeves may be required to fix the problem. In addition, once stuck, they can be tough to remove. This common problem results from damaged protective pin boots and environmental contamination. When there is a noticeable difference, further inspection is required.Ĭaliper slide pins stick or completely seize inside their bore. On most systems (floating caliper), it is normal for the inside pad to wear a little (~2mm) more than the outside pad. Sticking or seized slides, guide pins, and caliper pistons result in a pull while braking, brake drag, overheated and warped rotors, and uneven pad wear. It is vital to brake performance that the caliper slides freely over these guides. Brake caliper guide pins or slide pins allow the caliper to slide to apply clamping force while keeping it aligned with the rotor.
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