How do I adjust my mountain bike saddle? What is the front and rear adjustment of the mountain bike

1. The seat tube of the sleeve: loosen the bolts that fix the saddle, and then you can adjust the elevation angle and depression angle of the seat tube, and then lock the bolts after adjusting to the appropriate angle.

2. Single-nail seatpost: This seatpost is generally a 6mm hexagonal screw, which can be adjusted after being loosened, and there is a fine part of the corresponding tooth occlusion in the place where the saddle and the seatpost are connected, and the saddle pitch is adjusted to an appropriate angle and then tightened the 6mm hexagonal screw, generally 21 22nm.

3. Double nail seatpost: generally 3mm or 5mm of two inner hexagonal screws, two are arranged front and back, two are slightly tightened after the saddle is placed, and the pitch angle is adjusted by changing the different tightness of the two screws, the upper tightness of the front increases the pitch angle, and the upper tightness of the rear increases the elevation angle. Two screws are attached to an aluminum alloy sheet and the two rails of the saddle are tightened at the same time.

Everyone's flexibility and the ratio of arm and leg length are different. Moreover, the TT value of the riser angle of each frame is also different, so it cannot be calculated directly by numbers.

The best way is to go directly to the car shop to do fitting, so that the car is the best for you.

The height of the seat cushion is to set the height of the seat cushion. The height of the saddle is the most important aspect of a bike's setup, especially when it comes to knee injuries and pedaling effort. If the cushion is too high, the knee is prone to injury, and if the center of gravity is too high, it is easy to cause accidents.

Simple adjustment method.

Relax the seat post clamp, clamp the saddle with your armpits, stretch out your arm and use your middle finger to touch the pivot position of the center axis (the pivot point of the crank), at this time, you should pay attention to a point, try to relax your arm, in a natural drooping state, this method is to use the proportion of the human body to do the measurement, but this method may not be accurate, after all, everyone's arm length is different, we can fine-tune it.

After adjusting the height according to the first method, find a pedaling point to ride on the bike, touch the pedal surface with the forefoot, put the pedal to the 3 point direction (horizontal state) when the knee and the foot pedal are in a perpendicular state, and keep the leg extension angle at about 170° when the pedal is pressed to the bottom. Follow this method to fine-tune your saddle height by 3-5mm each time. This is the easiest way to do this, and it may not be very accurate, but it will not deviate too much.

This is also a reference way for me to adjust the height of the saddle when I first ride, and it is easy to grasp the height of the saddle when I have some riding experience.

Slightly more complicated adjustment methods:

Heel method. There are a number of car shops as well as the methods commonly used by "senior" fitness trainers. First, get into the saddle, keep your hips level, turn your pedals to the 6 o'clock position, and place your heels on the pedals.

If your knees are straightened at this point, you have gained your saddle height. This method basically achieves the right saddle height, which takes into account the length of the legs, but it is not entirely accurate when the ratio of the thighs and calves of some riders is different.

Coefficients. The specific method is to measure the height of the crotch, the English name is inseam, and then multiply the coefficient, and the calculated value is the distance from the pedal axis to the top of the saddle when the pedal is in the 6 o'clock position. This method has been used for a long time, and the value obtained from the saddle height is more scientific. However, when measurements were made with scientific instruments, it was found that this method did not achieve the best power output and pedaling efficiency.

Coefficients.

Raymond Law. lemond

Raymond, an American and three-time Tour de France champion, has improved on the method of calculating the height of the saddle based on the coefficient method. The length of the crotch is multiplied as the distance from the top of the saddle to the bottom bracket. This calculation method is more accurate than the coefficient method, and the seat height determined by the Raymond method is more accurate, and there is a "but" here, but this method found that the problem still appears in the proportion difference between the thigh and the calf, and when a rider's thigh is relatively long, this method has some problems.

The above methods can be used as a reference for riders, according to their own situation to adjust the height of the saddle suitable for themselves, in fact, in the riding to experience carefully, you can also find the height suitable for your own riding.

How to adjust the height of the saddle of the bike:

Heel method

This is a very common and simple way to do this, when you sit in the saddle, put your heels on the pedals and adjust the height of the saddle so that your legs are vertical to the pedals, and see if they are level with your hip bones at the lowest point.

However, this method is not scientifically proven and often leads to a low saddle. Professor Will Pelever of Mississippi Women's University, who has published several articles comparing various adjustment methods, said: "The main problem with this method (the heel method) is that it does not take into account the differences in the physiology of each person, such as the length of the thigh, calf and foot plate.

Mountain bikes can be adjusted to suit the racing model when riding on climbs and gentle sections. However, when going down the hill or rushing uphill, the saddle must be lowered, which is conducive to the center of gravity can be moved back at any time, and the car can be better controlled when encountering a drop. Some riders don't really care about this problem, and many times try to raise the saddle as much as possible in order to be cool, the higher the better, in order to look good on the ride.

Resulting in unstable riding and even injury.

109% method

A better approach was proposed by Hamley and Thomas in 1967 when they experimented with a variety of different saddle heights and decided that the ideal saddle height would be the inseam length (the length from the perineum to the sole of the foot or the length from the top of the axle of the pedal to the highest position of the saddle) of 109. Through various practices, this method has been widely welcomed and affirmed by the top coaches in the industry.

Homs Law

The original purpose of this method was to reduce overstrain injuries during cycling. The Holmes method is very different from the above three methods, and it is necessary to use a protractor, which is used to measure the angle between the knee and the lowest position of the pedal (as shown in the figure).

Holmes recommends this angle between 25 and 35 degrees, and the closer to 25 degrees the better it is for those older injuries (patellar tendonitis). However, this method may be too technical, and it is usually best to choose the above INSEAM method.

Pay attention to things: the adjustment of the saddle height is very important in riding and directly affects the quality of the rider's ride. If it is too high, the leg will be stretched too straight and completely tense when the foot is on the bottom end, which will cause too much tension on the knee joint. If it is too low, when the foot is on the top, the knee joint is very tight, resulting in knee joint injury and pain, the knee joint is a complex joint, local blood circulation is poor, once the injury is difficult to heal on its own.

The front and rear of the mountain bike saddle are adjusted according to the front and rear position of the saddle.

1. The setting of the front and rear positions of the cushion is actually quite simple: first sit on the cushion, put the soles of the feet on the pedal in the correct position and then step on it a few times, and then put the pedal horizontally, which is the vertical line of the front foot "knee which orange lower point" hangs down to just pass through the center of the pedal (that is, the pedal axis), so that it is completed. If the perpendicular line does not pass through the center of the pedals, adjust the position of the saddle in turn.

2. The position of the cushion is too forward, and the position of the cushion is too far in front or behind will affect the stepping force of the legs, and it is also closely related to the wear and tear of the knees, so it is not to be careful.

3. The most common mistake made by the average rider is to put the cushion too behind, which seems to make the car look more handsome and cooler, and it seems that it is easier to have that solid pedaling feeling, but the result of such hard operation will actually damage the knee in the long run.

The position of the saddle can be divided into three dimensions: height, front and rear, and angle. The height of the saddle can be adjusted, and there is a quick release under the seat, and the quick disassembly can be moved to the balance of the seat, which is the height you need to adjust.

Specific steps: 1. First measure the length of your saddle, and find the center position of your saddle, and the angle of the stool cushion should be roughly horizontal.

2. Heels.

Adjustment is the easiest and most common way to adjust, when you sit upright in the saddle, put your heels on the pedals, and adjust the height, suitable for novices but with minor errors.

3. Put the armpits.

Put it on the saddle, the position where the middle finger reaches the center of the bottom bracket is the height of your seat tube, adjust it, and then return the quick release to its original position, and the saddle is fixed and you are ready to ride.

1. Open the quick releaseTo start the rough adjustment, place the seatpost quick-release wrench.

Loosen halfway. <>

2. Pull up the seatCarefully pull up the seat with the armpits.

Clamp the seat cushion. <>

3. Align the sprocketAt the same time, the hands are straight down, and the tips of the middle finger can be aimed at the center of the upper winding wheel.

4. Tighten and release quicklyTighten the quick-release wrench and locate the support wall.

5. Sit on the seatSit on the seat and place one heel.

Place on the pedals.

6. Fine-tune according to your feelingsWhen stepping on the bottom, the knees should be basically straight, and fine-tune according to your feelings.