How to adjust the V brake of the mountain bike to the most suitable

1.Pull line:

Tighten the service nut on the brake lever to the tightest (turn clockwise all the way) and prepare to pull the cord. Thread the thread first and pre-tighten it on the fixing screws. Then leave a 5mm gap between the brake pad and the rim and lock the fastening screws.

Some people will ask, how can I leave a 5mm gap accurately? A relatively simple and practical way that I have figured out by myself, take two one-dime banknotes, each of which is [font=] folded in half 4 times, with a thickness of about 3mm, and then put the folded banknotes in the brake pad. Pinch the two brake arms with your hands respectively, and those with wire pliers can come in handy, (one less **) Wooden wire pliers can be replaced by a vise.

Tighten the brake line (please do not have too much clamping force on the vise, otherwise it will flatten the brake line, in the same way, the locking force of the locking screw on the brake arm should not be too large, just moderate), lock the fastening screws on the brake arm.

<>2.Adjust so that the stroke of the two brake arms is the same:

Take off two 1 cents. Pinch the brake lever with your hand and observe the travel of the two brake arms. The goal of our adjustment is to make the travel of both brake arms as the same as possible.

There is a tension screw on each brake arm, and the size of the tension of the brake arm can be adjusted by using a Phillips screwdriver (that is, the size of the angle to the outward), clockwise to increase the tension, increase the angle of tension, and vice versa. By adjusting the tension screws on both sides repeatedly, the stroke of the brake arms on both sides is basically the same. Some people will encounter such a problem, your tension screw is screwed to the end, but the opening angle of the brake arm on one side is still not large enough, what to do?

You can reduce the opening angle on the other side to balance the two sides, and there is another local method that works: please take out the spring in the brake arm on the side where the opening angle is not enough, and break it directly outward with a vise.

3.Adjustment of brake stroke:

Some people like a little longer braking stroke (which may feel a little better in the hand), but I personally prefer a short stroke that can be reached with a pinch.

The adjustment of the stroke can be adjusted by the stroke nut on the brake handle, and the counterclockwise rotation is to reduce the brake stroke, and vice versa is to increase. Adjust to your preferred comfort. Remember to tighten clockwise after adjusting.

Adjustment of the V-brake.

It is quite dangerous to hold the brake lever tightly while riding, only to find that even if you hold it all the way to the end, or even touch the handlebar, the brakes still do not work. This may be due to a certain degree of wear and tear on the brake pad itself, and the V brake needs to be tightened, or the brake pad needs to be replaced with a new one; The other situation is the stretching of the brake wire, especially after a period of use in the new car, which is very likely to occur, resulting in too large a gap between the wheel rim and the brake pad. Conversely, if the brake clearance is too small, it may cause the brake pads to rub against the rim when the brakes are not pressed, which of course needs to be adjusted.

If the brake pad is too high, it may wear out the tire over time; On the contrary, if it is too low, the friction area of the brake pad will be reduced, which will not only cause uneven wear, but also reduce the braking force. In addition, if the clearance between the brake pads and the rim on both sides is different, in addition to causing different degrees of wear on the brake pads; Simple adjustments are needed to maximize the functionality of the brakes.

Maintenance of V-brakes.

Use your index finger and thumb to press the V brake caliper inward and pick up the brake line duct. Then look at the wear of the brake pads (brake pads), and the correct wear should occur evenly on both sides. If there is significant wear on one side, it means that adjustment is needed.

After a period of use, uneven wear and tear may occur, you can trim off the more prominent parts, so that the surface of the contact rim is smoother, and the brakes will be more effective, but pay attention to the safety line of the brake pad, do not trim more than the safety line, if it exceeds the safety line, you need to replace the new brake pad (the next article will mention the reason for replacement).

Brake pads have obvious safety line marks or grooves to alert the user, if the safety line is grinded, or the grooves are smoothed, it means that they need to be replaced. If you don't replace it, you may cause the rim to rub against the brake base or pin, which can be dangerous in addition to injuring the rim.

The brake wire can be coated with a thin layer of oil at regular intervals to prolong the life and reduce friction, and the feel of pressing the brake will be smoother. The outer tube should be kept smooth, which will affect the brake feel, but also reduce friction, if the outer tube is broken, it should be replaced, so as not to infiltrate the water into the rust, and check whether the wire is intact and free of rust.

Hello, 1 Check the locking state of the axle block, do not have a frame, but also fine. Block to the original, bulk sales have no concentricity.

2. Check the axial and radial accuracy of the ring, and maintain high precision to cut the spokes on both sides of the axial and radial directions.

3. Loosen the hook and use dish soap to dissolve the water in the towel and clean the ring and brake skin in a wet state.

4. Close the hook, there are fine-tuning screws on both arms, and the fine-tuning to the brake skin can contact the rim at the same time. There is a pang pang sound when you pinch it.

And then it's fine.

When changing the disc brake, you need to replace the fork and wrist set suitable for the disc brake, the specific steps are as follows:

1. Ordinary mountain bikes are shown in the figure below, this fork is a low-grade model that is only suitable for V-brakes.

2. The old fork is a special-shaped square tube, which is not easy to match with a disc brake conversion seat, and the fork opening space is not enough.

3. Remove the head tube and measure the size, the outer diameter of the upper tube is about millimeters.

4. Find suitable products online and place an order to buy: disc brake seat, disc brake pad (the seller sends screws and brake pipelines), shock-absorbing fork, and a front wheel group.

5. Unpacking after arrival, it is the following parts.

6. Disassemble the wrist group first, try to install it on the new fork, and confirm that it can be installed normally.

7. Officially disassemble the old fork.

8. As shown in the figure below, knock down the lower wrist seat of the wrist group with a hammer and a screwdriver.

9. The lower wrist seat is more difficult to disassemble, so it is recommended to buy a fork and buy the wrist group by the way.

10. Install the new fork head tube and pay attention to the cordon.

11. Adding gaskets can solve the problem of disc brake deviation and disc rubbing.

12. After the disc brake is installed, the rotor and the front hub are not integrated and can be spun out.

13. The old screws of the fender cannot be installed, remember to buy a fork and ask for a new fender screw.

14. The whole picture of the mountain bike with shock absorption + front disc brake, the disc brake installation is completed.

Let's talk about the method of adjusting the disc brake, the hexagon No. 4, No. 5, and a movable wrench.

How it works: Disc brake pad problem: If the disc brake pad is bent, then the disc brake pad must be corrected first.

Method 1: Fix the front wheel of the bike first, then gently turn the rear wheel to see which position of the disc brake pads is curved. As long as you find out the deformed disc brake pads and then straighten them, you must control the strength here, otherwise it will cause secondary bending.

Method 2: Remove the disc brake pads to find two flat steel plates, clamp the disc brake pads and smash them flat with a hammer, which is easier and easier to level than method 1. (Regular disc brake pads are made of elastic steel plates, which are very flexible).

Disc brake problem: Loose screws.

Method 1: Let the car be in front of or behind itself, or directly reverse the car, so that it is convenient to observe the distance between the brake pads and the liner pads, and then adjust the screws to achieve the brake pads slowly without friction.

How it works: There are a total of seven screws on the brakes. According to the different positions of the screws, there are uses that are responsible for the corresponding positions, for example, screws 1 and screws 2 are used to fix the disc brake, and screws 5 are used to fix the brake line.

Screws 3 and screws 4 are used to determine the distance from the disc brake pads to both sides. As long as the gap is right, the 3 and 4 screws can be adjusted to solve the problem.

As for the size of the gap, it can be solved by screws 6 and 7. For example, grinding the disc brake pad on the right side can achieve the effect by adjusting the screw 7 (on the back of the disc brake) appropriately. Screws 1 and 2 are used to fix the disc brake, and screws 5 are used to fix the brake line.

Screws 3 and screws 4 are used to determine the distance from the disc brake pads to both sides. When the gap between the brakes is suitable, but the brake pads are grinding, it can be solved by adjusting the 3 and 4 screws mentioned above.

Brake line problem: The brake response is not sensitive enough, it may be that the brake line is too loose, as long as the brake line is tightened a little in debugging. Although there is a difference in the construction of mountain bike disc brakes, there will not be much difference.

The principle of debugging is the same. As long as you get used to it for a while, adjust everything that needs to be adjusted, and you'll be fine.

There is a tension screw on the left and right legs of the V brake to adjust the tension of the brake leg, the tension force that is too loose will cause one side to stick to the rim, use a screwdriver to adjust the tension screw to try, clockwise pants leakage, counterclockwise loose, but first of all, adjust the tightness of the pure leakage of the brake line key.

Mountain biking.

If the oil brake cannot be braked, adjust it according to the following steps. 1. Loosen the two screws before and after, carefully observe whether the disc is rubbing with the left side or the right side, if the disc is rubbing with the right side, then push the clamp to the right side, and evenly give the gap between the disc and the disc to the right side.

2. If the disc is rubbed against the left side, push the clamp to the right side to evenly give the gap between the disc and the left side.

3. When adjusting, the thrust should be even, pay attention to the order piece to be parallel to the disc, and after adjustment, we should tighten the two fixing screws of the finch attack posture device.

4. It is best to put the disc in the middle of the left and right pieces to ensure that the distance between the left and right sides of the plate and the disc is equal. The adjustment method for the front and rear brakes is the same.

Maintenance: 1. Keep it clean: Pay close attention to your car's drivetrain (bearings) and chain when washing the car, if it has oil, rust or dirt, spray some degreasing solvent on it.

Wash the body of your mountain bike, but also make sure that the bottom bracket and wheels do not touch the water, otherwise it will cause rust. After each wash of the bike, dry it with a towel.

2. From the top and bottom, squeeze to each link, slowly turn the pedal with one hand and squeeze the lubricating oil at the same time. Generally speaking, a thin layer of lubricant is sufficient, unless you live in a place where there is a lot of rain, then applying a slightly thicker layer can reduce the number of maintenance. Then use a rag to remove the excess lubricating oil.

3. Check your bike up and down for anything wrong, and tighten loose bolts, including crank arms and chain links. Replace worn parts. (Mountain bikes.)

pedals, tires, handlebars, etc.). Empty pedaling the bike and check the front and rear brakes.

1. Initial stretching.

If you haven't done it when you bought a car, let's do it first. Pull hard with both hands, if the brake is not tight enough, it will fall off. First, it can prevent the emergency braking force in the future from going too hard and getting off the line, and it can also extend the new brake line slightly.

Second, the clearance adjustment.

1. The clearance refers to the distance from pulling the brake lever to the brake starting to take effect, too big to react slowly, too small and not good, uncomfortable, adjust to feel comfortable when you pull it up. As the brake pads wear out, the clearance increases.

2. Adjust the adjustment knob on the handle.

1) Twist it out counterclockwise, and remember to lock the fixing screw of the outer ring to the end after adjustment.

2) However, do not turn to the level of almost rapid elapse, so as not to cause danger of falling off.

3. If the brake adjustment button has been adjusted to the limit, the brake line should be tightened again (1) Return the adjustment button to its original position before pulling.

2) Loosen the screws.

3) Tighten the thread and then tighten the screws.

Tools: wrenches, pliers, screwdrivers.

1.The adjustment knob on the adjustment handle is unscrewed outward counterclockwise, and the screws of the outer ring are adjusted and locked to the end.

2.If the brake adjustment knob has been adjusted to the limit, it is necessary to re-tighten the brake.

Braking, also known as braking, is the action of stopping or slowing down a running locomotive, rolling stock, or other means of transport or machinery.

The general principle of braking is to fix a wheel or disc on the high-speed shaft of the machine, install the corresponding brake shoe, belt or disc on the machine base, and make it produce braking torque under the action of external force.

The brake device is a mechanical braking device that can slow down the speed of the vehicle, also known as a reducer.

A screwdriver will do. Screw the brake drum a few times and turn the wheels! Be careful not to adjust too tightly. You have to leave some free space.

That's according to your own height, the frame has been fixed when you buy a car, and now you can only adjust the height of the cushion according to your height, generally sit on the cushion, step on the pedal with the forefoot, and the leg is just straight. Then there is the width of the handlebar, which is normally equal to the width of your shoulders. As for riding, it is recommended to maintain an even cadence, the best frequency is 90 rpm, and then adjust the transmission according to the road conditions and wind direction to maintain a good speed and save a lot of physical strength.

Another suggestion, you must wear a helmet when riding a bicycle, wear cycling pants, and preferably cycling shoes, which can save a lot of physical strength!