Bicycle braking problem at high speed

One, the emergency brake should use the front brake or the rear brake ——– the big role of the front brake!

Because your car has two sets of brakes, one for the front wheels and the other for the rear. To stop your bike safely, you need to know how to use the brakes.
Common saying is: use front brake and rear brake at the same time. Theory is all very well for a beginner who is not yet proficient in riding skills, but if you can’t get past this stage all the time, then you won’t be able to develop the professional skills of controlling the bicycle skillfully
Usually want to live in the most short distance cycling, is the best way to hold before brake to rear wheel just float above the ground level, because the moving human body and the inertia, the car has a forward grows downward acceleration, the two forces formed at the same time make use of a forward lower part together, braking action is to rely on the tire and ground friction resistance force component of forward, And the more pressure there is, the more friction there is, so most of the friction is coming from the front wheels. The rear brakes were completely useless because the rear wheels were floating. Make full use of the rear brake on soft or slippery roads, or when the front tire blows out, whereas the front brake will always provide maximum braking efficiency on flat, dry roads, theoretically or practically. Once you learn to use the front brake properly, you will be a safe rider.
You must be a little worried, won’t you do a forward roll? This is possible, but only for riders who have not mastered the front braking force. As for some riding friends to rely on the brake to stop the bike, after they have an accident will Epiphany: emergency, because of panic and instinct to seize the very strange front evil, increase the braking force together, the result is often fall forward roll, easy to be injured.
It has also been suggested that a “front roll” occurs not because the front brake is too hard, but because the car stops and the rider continues to charge until his rear “sits” on the handlebars and changes riders. This does not happen to people who use only rear brakes, because when the rear wheel is off the ground, it is no longer braking because of the loss of friction, but the cost of using only rear brakes is that they increase the distance by twice as much as using front brakes. Therefore, for riders who ride fast, it is not safe to rely only on the rear brake. Remember, in the emergency brake, with the arms firmly support the body to avoid forward, the key is to push back as far as you can handle (do not stick to the mat), try to shift the weight back. This technique applies to all braking conditions, whether the front brake is used alone or both.
Using front and rear brakes at the same time is easy to produce “tail-slam” phenomenon. If the front brake is still working when the rear wheel sideslip, the rear wheel will throw over the front wheel, because the deceleration force of the front wheel is greater than that of the rear wheel. Once the rear wheels slip, they tend to slide sideways rather than forward. At this point, the force of the rear brake must be immediately reduced, or fully released after the brake, to restore the normal movement of the rear wheel track.
Summer in the hot asphalt or cement road surface, the use of the front brake more than the rear brake, can also be said to be the front brake is given priority to, the rear brake is supplemented, and even after all need not brake. Some people abroad strongly advocate this idea.
Theoretically, the maximum braking effect occurs when the rear wheel is just about to float off the ground before braking, and even a slight application of the rear brake may cause the rear wheel to skid. To test this theory, find a large square and apply both front and rear brakes, but apply most of your force to the front brakes. Keep pedaling and your feet will feel the rear wheels floating. Accelerate slowly at first, then gradually increase your speed and apply the emergency brake until you notice the phenomenon. That way you can learn to hit the point where the rear wheel floats.

Two, the big role of the rear brake
Why use the rear brakes when you can just use the front brakes? The rear brake is actually very useful, in the following circumstances must be used.
1, wet road: on the dry road, the tire is very little skid, but on the wet road, the situation is different. In this situation, if the rear wheel skid, it is easy to restore balance, if the front wheel skid will not be able to save, so you must use the rear brake to stop the car.
2, soft road surface: the situation is similar to wet road surface, the possibility of tire skid increases, also must use the brake to stop the car, only at this time can be used as appropriate before the brake, before the wheel does not skid as the limit.
3, bumpy road: walking on the bumpy road, the wheels are likely to jump off the ground, in this case can not use the front brake. If you use the front brakes with the front wheels jumping off the ground, the front wheels will lock up, and landing with a locked front wheel would be a bad thing.
4, front tire: when riding a bike if the front tire suddenly burst, can not use the front brake, if in this case with the front brake, the tire may be out of the ring, and then lead to the car overturned.
5, front brake failure: front brake cable broken or excessive wear brake skin and any other problems lead to the front brake can not be used, of course, only after the use of the brake.

Post time: May-10-2022