What is difference between Drum break and DIsc break?

Drum brakes are what they sound like, a round drom in which brake shoes push outward on from the inside thus stopping the vehicle.

Disc brakes on the other hand use a disc instead of drum and brake pads on each side of it and when you apply the brakes they squeeze the disc to stop the car.

This is a simple explination of both

On a car like that I would not worry about it having rear drum brakes. Since the 1970's most cars and light trucks have come with disc brakes on the front. Rear discs only came on the high end performance / sports cars and some of the high end luxury cars. It was not really until the 1990's that you started to see more common cars with rear discs. Rear disc is actually more expensive to produce in most cases because of the emergency / parkinig / service brake mechanism. On a drum brake adding that function just adds 2 parts. On a rear disc there are 2 options. One is they add a lot of parts and complication to the caliper with increases the cost and decreases the reliability. The other method which was common originally and has become popular again is they actually build a small drum brake inside the disc rotor for the parking brake. This then allows them to use a typical caliper on the disc. This obviously adds a lot of parts which drives up the cost but in the long run is the more reliable method.

Drum brake:

http://www.carbibles.com/images/drum-single.jpg

The outer part(drum) moves with the wheel, the rest remains stationary. The Actuator pushes the copper colored parts outward which slows the speed of the drum which slows the car.

Disc Brake: http://www.carbibles.com/images/basicdiscbrake.jpg

The rotor/disc moves with the wheel. The rest doesn't. The caliper pushes the pads against the disc which slows the car down.

In many cases, discs are considered stronger and the more sporty design. But all tractor/trailers use more drum brakes because it is easy to create more surface area which stop the vehicle sooner.

Disc Brakes use Brake Pads and Drum Brakes use Brake shoes.

Drum breaks uses pads against a drum screwed to your wheel, Disk uses a calliper with pads against a rotor screwed to your wheel.

Before you can get an answer on that, you need to learn to spell BRAKE! DUH!

drum brakes push out disc brakes have pads which push in

Hey!

Of course there is the name, but they are massively different!

Drum brakes are an older design that has been used since the early 1900's.

Disc brakes are newer, and started coming out in the late 60's

Drum brakes do work, and often very well. They are not hard to fix, but tend to heat up when applied too much.

Disc brakes are almost always better. They hold well, and have less parts to go bad. Most disc brakes are hydraulic, and that is an advantage. Disc brakes tend to squeak more than drum, usually not a problem, and easily fixed.

It is best to get a bike with disc brakes, but I would not dismiss a bike with drum brakes, if I like other things about it.

I have to take exception to an answer above. Drum brakes will not stop a tractor trailer SOONER. It is all about physics. Motion is transferred into heat during braking. There is about 80,000 pounds to stop with a tractor trailer. The large steel drum brakes absorb more heat more times better than a disk brake. After a few starts and stops with a disk brake on a tt, the disk would warp or melt from the heat created during braking. The only thing that would stop a tt sooner is more surface area of brake and tire. If you lock the brakes up no more brake area would help (you need more traction ie more surface area of tire)..But on a smaller vehicle the weight savings of the disk is more than the need to dispell more heat because of the lesser amount of weight of the vehicle. Hope this helps.

Disc brakes are considered better for prolonged instances of braking because they are able to cool quickly (this reduces the amount of "brake fade" caused by the expansion of materials under the heat of the friction), from a practical point of view it is quicker and simpler to replace the pads than shoes and disc brakes are, including the hydraulics required, lighter than the drum assembly.