Stuff

Intro

All braking systems, in both bicycles and cars, operate on the same basic principle that: friction between two surfaces will dissipate energy in the form of heat, thus reducing the amount of kinetic energy possessed by the vehicle, and slowing it down.

The advantages of rim brakes are that they are inexpensive, lightweight, mechanically simple, and easy to maintain, as well as very powerful. The main disadvantage of rim brakes is that their performance deteriorates in wet weather when the rims are wet. This problem is less serious on more expensive bikes which use rims made of aluminum alloys than on those with steel rims. They are also prone to clogging with mud, particularly when mountain biking. Rim brakes also need regular maintenance. Brake pads wear down quickly, and have to be replaced. Over long periods of time and use, rims also become worn.

Caliper brakes

There are 3 main types of caliper brakes:

1. Side-pull

2. Centre-pull, and

3. Dual-pivot

Side-pull caliper brakes

Cantilever brakes

V brakes

Rim brakes use the same brake pads made out of rubber. However the rubber can be made softer to increase its coefficient of friction, or made harder to increase its longevity. Some pads contain abrasives to further increase friction, but they wear out the rim more quickly.

Cable operated disc brakes

- The main advantage of disc brakes is that their performance is equally good in all conditions including water and mud.

- Don’t wear out the rims like rim brakes

- They dissipate heat more effectively, allowing the rim to remain cool. This also prevents the risk of building up enough heat to increase tire pressure, enough to blow the tires off the rim.

- The disadvantages are that they are usually heavier and more expensive than rim