How Disc Brakes Works in Bikes

How Disc Brakes Works in Bikes


Two common brake system used in auto mobiles are drum brakes and disc brakes.

Disc system is more reliable. Disc brakes works on principle of applying friction or resistance to rotating disc. The brake has three major elements.

1. Cast Iron disk attached to wheels

2. Brake pads on both sides which apply resistance.

3. hydraulic piston which pushes each pad against disc.

When you apply disc brakes, Fluid is push through the tunnel cord, the fluid is pushed from master cylinder to piston in each wheel. the the piston applies equal force to both the sides of the drake pads. hydraulic system is used because it applies equal force to each cylinders. Thus the brake pads applies resistance to rotating disc..

Acutally there are two main types of Disc Brakes.

1. Mechanical Brakes

Cable disc brakes (mech) work on principle rim, the pads bear on disc rather than on rim (wheel rim). They are not used much as they require regular service and are more expensive., they are quite cheap.

2. Hydraulic Brakes

Hydraulic Brakes works on principle of hydraulic fluid which applies pressure to pistons which in turn applies equal force to pads are rotating wheels comes to rest. This type of brakes requires less adjustments. maintenance cost is not more and does not require frequent replace of disc. If avoided from damage to disc the disc brakes can last for years. They also do not make noise. Brake pads can wear out eventually and could result into entrying of air bubbles into the system. Just keep fluid to top.

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7 Responses to “How Disc Brakes Works in Bikes”

  1. October 25, 2011 at 10:21 pm #

    as the 2 brake pads apply preassure on the disk .then why the disc brake contains holes??

  2. avesh kadri
    October 26, 2011 at 9:31 am #

    The holes have a grater effect on the pads, signifigantly increasing the grab or friction of the brake caliper pads.
    They are also there to displace water, as the front end is quite exposed to wet.

  3. Rashid
    May 18, 2012 at 4:00 pm #

    The holes are used to increase the surface area , in-order to dissisipate heatefaster

  4. October 10, 2012 at 3:51 am #

    Yeah stick to a honda 200 or 150r big wheel my son is 11 and his toes touch the ground on both sides of the bike its prtety fast and its a racing bike with great suspension.

  5. Karthi
    March 1, 2013 at 3:29 am #

    Sir,what purpose of disc is hole in that plate?

  6. chetak
    September 8, 2013 at 12:26 am #

    Why it requires to top-up fluid?

  7. August 12, 2014 at 11:27 am #

    Sir,i thik dis brake r used to the bike is mainly depand on pressure. The dis n wheel r suddenly to the contact in pad so generated to the pressure. And 2nd pt of the holes in plate so i thik plate is suddenly very hot or heated so hole is mainly working on colling prosses…………
    I thik sir i m right

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