Like every component that evolves over time and the introduction of new technologies, there are some bike brakes that have fallen into disuse and others that are growing significantly. Currently the most common systems are: TRADITIONAL BICYCLE BRAKE: the traditional brake is a system that, through friction between special pads and the wheel rim, allows the bike/cyclist system to brake. The traditional bike brake is usually mechanical and transfers, through small cables, the force impressed by the cyclist's hand to the brake pad that comes into contact with the wheel rim. Depending on the material the rim is made of, there are different pad compounds so that the correct braking is always achieved. Traditional brakes, which are still widely used in road bikes, have now been totally replaced by disc brakes in land-based disciplines (MTB, CX, Gravel) while they still have a small share of the market in racing bikes. DISC BRAKE: it represents the safest braking method for bicycles because disc brake pads create a higher coefficient of friction. This system is available in different models and sizes. Smaller discs are suitable for cross-country or racing bikes, larger disc brakes for enduro, MTB and downhill bikes. Braking with disc brakes is also unaffected by rain or other external conditions, ensuring effective braking at all times. Then there are other types of brakes, which have a smaller market share and have never reached the general public: these are drum brakes, coaster brakes or the now obsolete rod brakes that acted directly on the tyre.