Brake discs for bicycles

Brake discs play a key role in the safety and performance of a bicycle's braking system. Choosing the right type of brake disc for your bike, taking into account factors such as material, design, size and compatibility, can greatly affect your riding experience and downhill safety. Ventilated and lightweight constructions can improve cooling and reduce the “withering” of the brakes during intensive braking.

Disc diameter can impact braking performance, with larger discs offering better braking performance. Discs tend to be available in various diameters, usually from 140 mm to 203 mm. Two brake disc attachment standards are usually used:

Centre Lock System: features a grooved interface between the rotor and the hub. The rotor has a matching circlip with internal grooves. A snap ring is threaded onto the hub and locks the rotor in place. It is a relatively simple and fast installation system.
6-bolt system: uses six evenly spaced boltholes on the brake rotor. These holes are aligned with the corresponding holes on the hub. The rotor is attached to the hub with six screws that pass through these holes. This system is widely used and is known for its compatibility with different brands.

How to choose the right brake disc for a bicycle?

When choosing the right brake disc for your bike, you must take into account features such as:

type of bike (mountain, road, etc.)
type of brakes (mechanical or hydraulic)
diameter of the disc
mounting type

How often to replace a brake disc?

The lifespan of a brake disc depends on use, driving conditions and maintenance. In general, brake rotors can last several thousand kilometres, but may need to be replaced if they are excessively worn, deformed or damaged. Regular inspections and maintenance will help determine when replacement is needed. Brake discs usually have their minimum thickness, which must be checked.

How to maintain and clean bicycle brake discs?

For maintenance and cleaning of bicycle brake discs, you can use a clean cloth or paper towel with brake degreaser, which will wipe off all dirt or oil from the surface of the disc.

What to do if the brake disc makes noise or vibrates?

If the brake disc makes noise or vibrates, it can be caused by various factors, such as dirt, incorrect adjustment or wear. Start by cleaning the disc and brake pads to remove any dirt or oil. If the problem persists, check the correct setting of the rotor and caliper.

Check out our video "Discs and brake pads - inspection, replacement"