Despite the fact that the majority of a bicycle's stopping power comes from the front brake, many novice and casual riders worry that if they apply that brake too hard, they'll go flying over the handlebars. As a result, to be on the safe side, they often only use the rear brake. It was for cyclists such as these that the Slidepad system was created. It allows both brakes to be applied with the squeeze of a single lever, in such a way that the front brake will never lock up on its own.
Read the full article: Slidepad lets cyclists apply both brakes using one lever