People get flipped by the front brake because it is more powerful, they are not used to the stopping power. You have to brace against the handlebars. It is mo

People get flipped by the front brake because it is more powerful, they are not used to the stopping power. You have to brace against the handlebars. It is more powerful because as the bike rocks forward the wheel is pushed into the ground and has more friction with the surface. The rear brake will loose grip under braking because it rises up from the ground. Aggressive braking in the rear is more dangerous because the wheel can lock up and skid, which can send you over the handlebars. The back brake tends to be setup to be more relaxed to stop people doing this. Maybe that is why people think it is safer. With a bit of practice you can get much better braking force from a front brake. Try it out on some grass, and see how far you take it before the back wheel starts to rise. You will find that you can stop much faster, which will make you safer. Just try it and see.