Because everyone's height, body shape and riding posture are different, before adjusting the seat cushion, just like choosing a frame or a whole car, we should measure the shoulder width, arm length, body length on both sides, and relax the gap between the upper body forward leaning and the limit upper body forward leaning, so as to obtain the required adjustment data.

1. Measure the shoulder width on both sides;

2. Measure the arm length from armpit to tiger's mouth;

3. The crossing height is measured from the perineum to the sole of the foot, which will be more accurate if a level is used; Take off your shoes when measuring;

4. The measurement method of body length is from the sternum to the soles of the feet, and shoes need to be taken off.

5. The gap between the relaxed upper body forward tilt and the restricted upper body forward tilt is the range where the seat cushion can be adjusted back and forth.

Second, adjust the seat cushion, seat tube and handlebar.

After obtaining the basic data of the rider, the relevant data can be obtained through the formula.

1. The distance between the seat cushion and the handlebar is calculated according to the data of relaxation and extreme upper body forward leaning and the arm length.

2. The correct height of the cushion is calculated by measuring the data of body length and stride height, and the adjustment point is from the central axis of the cushion to the top.

3. The datum points of the seat cushion are the center point of the seat tube and the bottom of the seat arch.

The starting point of the handlebar is from the center of the handlebar.

Third, the influence of seat cushion position on riding

The most suitable seat cushion position can be adjusted by the above method; In fact, in addition to the best position, there are two adjustment modes of the seat cushion according to different riding conditions or needs.

1. Adjust forward

Advantages: the forward adjustment of the cushion will make the body lean forward and increase the explosive force of pedaling, which is suitable for offensive and short-distance players; The focus of its adjustment is whether it can provide a good starting point. Because triathlon is equipped with a rest handle, the position of the cushion is mostly adjusted forward.

Disadvantages: As the body leans forward, the center moves forward relatively, which leads to an increase in the pressure in the tiger's mouth. Riding for a long distance will easily lead to sports injuries of wrists and jaws.

Backward adjustment

Advantages: when the seat cushion is adjusted backwards, the pedaling angle will move backwards, making it easier for the rider to contribute; So it is suitable for players who specialize in rock climbing; The key point of adjustment is not only to find out the pedaling angle of the force, but also to match the angle of the shift handle on the seat cushion and handlebar.

Disadvantages: it will cause the upper body to lengthen, and it will cause backache after riding for a long time.

Optimum position

Advantages: although it is the most basic, it is also the best riding position; Suitable for long-distance races or leisure riding; The key point of adjustment is to measure accurate basic data, so as to calculate the best position, especially the height of the seat cushion, and adjust the best stress angle.

Disadvantages: balance of attack and defense and complicated angle calculation and adjustment and length calculation.

Tips:

1. A good seat cushion position will make the rider's jaw, shoulders and waist triangular.

2. The height of the seat cushion surface will affect the comfort of riding, so it is best to keep it in a horizontal position.

3. The adjustment essentials of the cushion for mountain bikes and road bikes are similar, except that mountain bikes can be assisted by small speakers and rest handles, which makes it easier to adjust the proper position of the cushion.

4. The angle of the shift handle of the road car is closely related to the position of the seat cushion, and the front and rear direction of the handlebar needs to be adjusted with the help of the seat cushion.

Extended data:

Mountain bike, originated in the United States, Gary Fisher, Charlie Kelly and thomas ridge wanted a bicycle that could ride off the road, away from "police, cars and buildings", Tom Ritchey began to install accessories and motorcycle parts on solid single ATV before World War II.

In the same year, Gary Fisher and his friends braved death and went to Mount Pass, Tamal, paving the way for the birth of a new riding style. With Gary Fisher's great response in the mountain field, his Klunker was selected as one of the "Top Ten Mountain Bikes in History" by Mountain Bike Action magazine.

1976, Charlie Kelly began to promote a brand-new downhill race, which was the first great mountain bike activity. Charlie Kelly commissioned Joe Braise, the manufacturer, to design and develop off-road bikes, which were the first batch of "mountain bikes" ever made and named "Braise".

Joe Breeze designed and manufactured nine series of models from 1977 to 1978 based on Breeze. The prototype of Breeze is now in the Smithsonian Institution's National Museum.

References:

Baidu encyclopedia-mountain bike