The friction of mountain bike equipment

1, mountain bike why Ann ball? Turn in the mountain car front axle, rear axle, axle, handlebar, pedal rotation places like the ball douan. People always want to ride a mountain bike and easy and flexible and labor-saving. By rolling instead of sliding can greatly reduce friction. Therefore, in order to install ball in place of mountain bike rotation, we can often add the lubricating oil, the contact face away from each other, so that you can make the friction smaller.

Why, 2 Mountain Bike Tyre to have uneven pattern? The size of the friction is related to two factors: the size of pressure, the contact surface roughness. The greater the pressure, the greater the friction; contact surface is more rough, the greater the friction. Mountain bike tire will have uneven pattern, which is by increasing the mountain bike and surface roughness, to increase the friction, the purpose is to prevent the slipping of the mountain car.

3, after the mountain bike brake, why can stop? Brake, brake friction between the skin and the rim, will hinder the rear wheel rotation. The greater the pressure, the pressure of the brake pad is greater, the friction force is bigger, the rear wheel rotates more slowly. If the brake completely dead, then the friction between the rear wheel and the ground becomes (the forward direction of the original sliding friction to rolling friction,), backwards hinder the mountain bike movement, so stopped.