Common questions

What is the part called that holds the brake pads?

What is the part called that holds the brake pads?

Usually found on the front wheels, disc brakes feature brake pads that press against a disc (rotor) when the brake pedal is applied to stop the vehicle. The pads are attached to a brake caliper assembly that frames the rotor.

Why do some disk brake pads use split-pins or bolts to?

Every Shimano replacement pad that is compatible with a caliper that uses the bent pin type retention pins will come with any replacement pin or pins that may be needed, plural because there are actually 3 length/profile variations of bent pin across Shimano calipers. There is no metallic versus organic distinction involved.

How are the brake pads attached to the rotor?

The caliper is fixed to the carrier by two sliding pins, the pins are lubed and allow for smooth caliper action. The pads sit on the carrier with the brake pad arms in a rail. The rail holds the pads snugly in place and guides it to the rotor as the brake pedal is pressed.

What causes a brake pin to get stuck?

There are several possible causes. Something could be wrong with the brake line or piston. But often the problem is a stuck caliper pin. One or both of the little rails the caliper slides along — the caliper guide pins — get sluggish or seized. And that means your caliper won’t slide, and the outside brake pad won’t fully squeeze your rotor.

Can a bent Cotter be used as a brake pin?

If the threaded pin is lost or damaged, a bent cotter type one of appropriate length can be substituted without issue. Neither style is subjected to braking loads in any way. The pin is a loose fit in the hole of the pads. Braking loads from the pad are entirely pushing on the lips of the caliper that the pads rest against.

Every Shimano replacement pad that is compatible with a caliper that uses the bent pin type retention pins will come with any replacement pin or pins that may be needed, plural because there are actually 3 length/profile variations of bent pin across Shimano calipers. There is no metallic versus organic distinction involved.

The caliper is fixed to the carrier by two sliding pins, the pins are lubed and allow for smooth caliper action. The pads sit on the carrier with the brake pad arms in a rail. The rail holds the pads snugly in place and guides it to the rotor as the brake pedal is pressed.

There are several possible causes. Something could be wrong with the brake line or piston. But often the problem is a stuck caliper pin. One or both of the little rails the caliper slides along — the caliper guide pins — get sluggish or seized. And that means your caliper won’t slide, and the outside brake pad won’t fully squeeze your rotor.

If the threaded pin is lost or damaged, a bent cotter type one of appropriate length can be substituted without issue. Neither style is subjected to braking loads in any way. The pin is a loose fit in the hole of the pads. Braking loads from the pad are entirely pushing on the lips of the caliper that the pads rest against.

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Ruth Doyle