(1) Instructions for use:
A beat suitable for beginners:
Wilson, we ... Open the operating system. tennis racket
Specification: length: 69.85cm
Description: Model: T5522C
Commodity color: gradient color
Suitable age: 10 years old or above
Irregular: Yes
Warranty period: 3 months
Commodity material: carbon aluminum alloy
Brand Profile: Wilson Wilson
Packing list: Wilson racket box, tennis racket
Packaging: bagged
Packing material: handbag
Product introduction:
Front: 1 10 square inch
Material: carbon aluminum alloy
Length: 27.5 inches
Weight: 288 grams
Winding: 16* 19
Racket technology: fused graphite
The new products introduced by Wilson Company after improving the old American Open tennis racket have a softer feel, which greatly reduces the shortcomings of the previous carbon-aluminum racket, such as high hardness and poor shock absorption.
Instructions for use:
Suitable for beginners.
Wilson titanium graphite product description
Specification: length: 69.85cm
Description: model: T 1774C
Product color: black
Suitable age: 10 years old or above
Irregular: Yes
Warranty period: 3 months
Commodity material: carbon aluminum alloy
Brand Profile: Wilson Wilson
Packing list: Wilson racket box, tennis racket
Packaging: bagged
Packing material: handbag
Product introduction:
Front: 1 10 square inch
Material: carbon aluminum alloy
Length: 27.5 inches
Weight: 25-29 kg
Winding: 16* 19
Recommended pulling force: 55-65 pounds
The new products introduced by Wilson Company after improving the old American Open tennis racket have a softer feel, which greatly reduces the shortcomings of the previous carbon-aluminum racket, such as high hardness and poor shock absorption.
Instructions for use:
Suitable for beginners.
Wilson ultrapower 1 10 "carbon-aluminum tennis racket.
Specification: length: 68.58cm
Description: model: T 1773C
Product color: black
Suitable age: 10 years old or above
Irregular: Yes
Warranty period: 3 months
Commodity material: carbon aluminum alloy
Brand Profile: Wilson Wilson
Packing list: Wilson racket box, tennis racket
Packaging: bagged
Packing material: handbag
Product introduction:
Front: 1 10 square inch
Material: carbon aluminum alloy
Recommended weight: 55-65 pounds
Weight: 25-29 kg
The latest series of carbon-aluminum entry-level tennis rackets in 2007 are suitable for playing tennis for the first time, and do not need to spend too much money on tennis lovers.
Beginners buy tennis rackets
Carbon fiber is a fibrous carbon material, which uses some organic fibers (such as nylon, acrylic, rayon, etc.). ) as raw material, organic fiber is combined with plastic resin, placed in rare gas and carbonized at 2000-3000 degrees high temperature and pressure. Generally used in aviation, military and so on.
Carbon materials are usually materials containing carbon elements in powder form, such as graphite.
Tennis racket material carbon aluminum material and carbon titanium material are cheaper.
Tennis racket material glass fiber 400- 1200 RMB.
Tennis racket material carbon/glass fiber (carbon material/glass fiber) is generally 700- 1300 RMB.
Tennis racket is made of carbon fiber (carbon fiber) 1700-3000 RMB.
Carbon fiber is a kind of high strength fiber, as soft as rope. It should be combined with the resin matrix and cured. The proportion of resin is generally between 38% and 57%. The higher the resin content, the worse the performance of the tennis racket and the cheaper the price. There are tennis rackets with resin content below 34%, which are special rackets for professional competitions and are very expensive. Commonly used resins are: polyester, epoxy resin, thermoplastic resin, etc. Among them, epoxy resin-based carbon fiber tennis racket has the best performance, several times higher than other resins, and the racket has the highest price. The racket used in professional competition adopts epoxy resin-based carbon fiber prepreg, with 34% epoxy resin and 66% carbon fiber. I don't have a tennis racket made of 100% carbon fiber because it can't be molded at all. This is a lie of the merchants. In foreign countries, they dare not label materials like this. Why do they just cheat us China people?
Carbon fiber prepreg 125g/m2, excluding tax 137.3 yuan /m2, and then multiplied by tax 17%, the blank weight of one beat is 330-350g；; In addition, the corner loss is reduced by about 430 grams. Plus labor, grinding, painting (85- 1 10 yuan/piece), auxiliary materials (70- 120 yuan/piece), packaging (85- 160 yuan/piece), defective rate and production equipment. Plus the profits of sellers and retailers, plus 5% business tax, plus 20% income tax and so on. The cost of materials is only a fraction of the selling price. Take our commonly used nail clippers as an example. Its material cost is less than 0.23 yuan. The retail price of 3 yuan nail clippers is relatively poor. The average retail price of nail clippers commonly used in our family is around 8- 10 yuan. However, the production process and technology of nail clippers are much simpler than those of carbon fiber tennis rackets. Let's look at the gap between the material cost and the sales price of daily necessities, cosmetics and large and medium-sized consumer goods. If 300-500 yuan can buy 100% carbon fiber tennis racket, then 50,000 yuan can easily buy a BMW. It's so fake! ! ! !
The surface of the tennis racket is coated with a beautiful paint, and it is impossible to see what material is under the paint.
When buying high-priced tennis rackets, it is best for merchants or manufacturers to make a written commitment to the ingredients of tennis rackets, such as fake replacement, valid for at least 3 years. In this way, when you want to replace the racket or the racket is damaged, you can see it clearly by sawing it. Glass fiber, carbon fiber, carbon, carbon aluminum, carbon titanium and other materials can be distinguished. There are more and more people who know about carbon fiber in China. Take the sawed part and ask for advice. It's fake. You can sue him for fraud and demand compensation. At present, there are many materials in the domestic market.
Many brands of tennis rackets are made in China. The materials used to make tennis rackets determine the performance, quality and feel of tennis rackets. It is better to value the brand than the material (if you know the material) and the written commitment.
The logo on the tennis racket:
W is Wilson.
He is Hyde.
Y is Younix.
D is Dunlop.
All kinds of equipment used by professional tennis players can be provided by well-known sporting goods sponsors, one is to improve brand awareness, and the other is to ensure the continuous competitive state of professional athletes. In addition, the rackets in the hands of professional tennis players are different from those available to the public. This is another embodiment of the brand strategy of tennis equipment.
AMSSEFCSL's criteria for choosing tennis rackets
"AMSSEFSCL" standard is very popular in the world. The following are the nine elements of the AMSSEFSCL standard:
A-constant weight (weight)
A racket that is too heavy will make the player move slowly when swinging, and a racket that is too light is not easy to cope with a strong incoming ball and is easy to retake.
Normal selection: Generally speaking, the application range of young men is 320—330g, middle-aged and elderly women are suitable for rackets between 300—320g, and the application range of young women is 280—300g.
M measurement (handle size)
Just like weight, the size of the grip should make you feel comfortable.
Normal selection: 4 3/8 is suitable for ordinary male players, and 4 1/2 can be used as a bigger one if the ability allows; Female, 4 1/4—4 3/8.
S skin (holding skin)
The outer skin on the grip is the part of the racket that contacts the human body. When the skin is bad, you can't grasp the racket well. In this case, even if you have the best racket and the best skills, you can't play.
Normal selection: the skin of the grip needs attention and frequent replacement, which is a good way to keep the skin of the grip in the best condition.
S- dessert (sweet area of noodles)
Hit the ball away from the center of the racket, which is called sweet spot in English (translated as "dessert" or "sweet area" in Chinese). Normal choice: a large racket is easy to learn and can hit the ball slightly off the center. The disadvantage is that the speed is not enough and the control is not good. Suitable for women, beginners and the elderly, and it is appropriate to use11115 square inch. Small racket face is suitable for middle and senior players and young players. It is characterized by fast ball speed and good point control, but small sweet area.
Electron balance (equilibrium point)
The balance point is related to the weight of the racket face, and its central topic is "heavy head" or "light head", which is also a topic suitable for everyone.
Normal selection: the head weight is suitable for long-range shooting, and the bottom line draws the ball; Logger Vick is suitable for tennis volley, which is commonly used by two-handed players.
F-shape
The shape of each racket face has its own unique design concept, and the location of the sweet area is different with different shapes. Generally speaking, the shape of the racket face is mainly oval and oval, the sweet area of the oval racket face is in the center of the racket face, and the sweet area of the oval racket face is in the center behind the racket face, which is close to shaking hands. Those who are good at steady shooting can choose the former, and vice versa.
Normal selection: This can be seen from the introduction of the beat or label.
C structure (structure)
From the structure of tennis racket, the whole racket will have different hardness. Of course, people with big swing and strong power are suitable for people with low hardness (if people with big swing and strong power use a racket with high hardness, the handle, racket mesh and racket frame of the racket are easy to be damaged).
Normal selection: it will also be displayed in the label, and most of them are represented by numbers. The larger the number, the smaller the hardness.
S-the number of pounds of the racket.
The higher the number of pounds of the racket, the lower the elasticity, but the player with fast swing speed can get better ball control effect. A low number of pounds will produce a spring bed effect, increase the rebound force and reduce the relative possession of the ball.
Normal choice: The most commonly used weight of tennis rackets is between 55 and 60 pounds, and professional players often wear them ("wearing" means that professional players require manufacturers to wear thicker net wires when producing rackets-because the net wires are thicker, the weight is larger) to about 70 pounds.
L- linearity (line selection)
The mainstream of tennis thread is nylon thread, which can be produced in large quantities because it is not afraid of moisture and wear-resistant, and its price is reasonable and popular. However, nylon thread also has shortcomings because it is easy to relax and the number of pounds changes.
Normal choice: there are too few durable and easy-to-hit lines, because the thicker the line, the more durable it is, and the thinner the line, the better it is. Therefore, people who will be disconnected in three or two days had better wear thick thread with a diameter of 1.35mm to 1.45mm, but the thick thread doesn't feel very good. The thin thread is generally between 1.20mm and 1.30mm, with keen ball cutting and good elasticity.
Some parameters of tennis racket
Head size:
The racket face MID 95 square inches, MP 96- 100, and the OS racket face is on it. That is, China, China, Canada and Super Large.
Generally speaking, novices and weak women suggest using OS to hit the face. The hitting area is large and the dessert is large, which makes it easy to catch the ball. Moreover, due to the large hitting area, the power of the ball is dispersed after hitting the net, the force unloading effect is obvious, and the use force is convenient. Because of the small dessert, the racket face requires high skill and strength when hitting the ball, but more concentrated strength when hitting the ball can facilitate powerful players to make a fierce blow! Therefore, most of the rackets on the middle racket face are heavy rackets, which are specially equipped for violent players. And MP racket, can be said to be the most mainstream racket today, can be used from experts to newcomers, and can be selected according to their own characteristics.
Length: The standard racket length is 27 inches /69 cm.
Among adult rackets, there are no short ones, only long ones. In order to lengthen the arm, but the demand for strength increases, it can bring more strength to serve and hit the ball. Please refer to the knowledge of basic mechanics in middle school for this question. Zhang Depei was the first person to try a long shot, so he increased the service speed to120mph. The most famous lengthening rackets are POG lengthening, that is, Zhang Depei generation, and PD+ endorsed by Roddick. However, it is not recommended for beginners to use PD+, because it is very easy to get tennis elbow due to uncoordinated movements. However, Zhang Yilong can recommend it. It is extremely friendly to the arm, but it is a bit heavy and does what you can.
String weight:
How powerful it is, you will know if you can play it if you shoot more. Except O3, the weight of other beats can be used as the parameter of swing weight.
Give a reminder to men who want to play violent ball: the master has strong coordination ability, and he can play violent ball with a light pat, but the average person is not strong enough. If you want to play violent ball, it is better to use momentum theorem, that is, if the racket hits the ball hard, the opponent will work harder. That's why people like Roddick who don't paint have to add a lot of lead to the beat.
Balance:
Save effort before putting the net, and the bottom line is laborious. It's hard to touch the net again, but the bottom line is to save effort. However, if you want to exert your strength and strengthen control, your head is light. For technical players or women who don't want to hit their arms hard, it's good to take a head shot again. If you want to learn from professional players, relax. Control and self-development are ways to improve skills!
There is a counterexample. Sister W, big and small, is super strong, retakes her head and often makes extremely nonstandard movements to hit the ball, but because they have muscles that are not lost to men, ......
Data explanation: 1pts has a light head, that is, the balance point of the racket is near the handle 1 point;
Formula: 1pts = 1/8 inches =1/8 * 25.4mm = 3.175mm = 0.3175cm.
For a racket with a nominal length of 27 inches or 68.5cm, the balance point is 31(68.5/2-0.3175 = 33.9) cm away from the handle. The balance point value of the head weight plus the midpoint.
NSIX-ONE 90,9 nods gently, that is, 68.5/2-0.3175 * 9 = 31.4, that is, the balance point is 3 1.4CM away from the handle number. The number on the website is 3 15, which is different because the rounding point I took is more accurate.
1 nodding weight, that is, 68.5/2+0.3 175=34.5CM, that is, the number of grips from 34.5CM. ..
Most rackets will be lighter than the original weight, which we can understand as saving some weight through inertia. O3 is an exception. The oversized hole reduces the negative force and makes the racket swing much lighter than its own weight. I wonder if there will be a situation where the self-weight is 350 grams and the swing coefficient is less than 300. This index suggests that you try it yourself before you feel it. Because the swing weight is greatly influenced by factors such as hitting mode and position.
Stiffness (hardness):
The harder the racket, the more elastic it is for the ball and the arm, so the soft racket is very friendly to the arm. However, if used well, it is also terrible to use the power of hard hitting after the Force. Think of PD+' s American gun 250+KMH suit. Soft rackets have large deformation and strong absorption, and need more self-exertion. If you like to borrow money with little effort, you'd better choose a racket with hardness above 65. On the contrary, powerful people can better exert their control and strength with soft beats.
Beam width: 22-25mm
The factor that directly affects the strength index of the racket is that the thicker the racket frame, the smaller the deformation of the racket tube, the stronger the racket strength and the better the shock absorption. The thinner the racket frame, the better the control of the racket and the more flexible the racket. The thickness of the racket frame is also related to the size of the racket face, and the OS racket face is rarely less than 20 mm In short, the narrow-sided racket is a violent racket, and both L6 and Tour90 belong to this category. Wide-sided ones such as PD have good borrowing effect.
Composition: graphite/Kevlar fiber (Cabra)
At present, carbon is the main material in the racket, and metal or fiber substances are added to increase the hardness of the racket and strengthen its strength and stability. Just to explain, some people are not used to the vibration of metal elements, and can choose a pure carbon fly swatter with good shock absorption effect. This varies from person to person.
By the way, explain the problem of shock absorption here. If you feel vibration, add shock absorption. If it's too dull, don't add shock absorption. If you still feel that the wood has no shock absorption, change to a strong vibration line or a strong vibration beat. People with a keen sense of touch, such as Federer Safin, don't need a shock absorber, but they will use it like old San Agassi. Strong players such as Nadal and Clijsters also use shock absorbers. So let's judge for ourselves. Moreover, shock absorption also has different styles and effects, and the more wires are wound, the better the shock absorption effect is.
By the way, a batter who uses more than 95 rackets, if he uses a hard line other than Lux wave, will often be knocked off by using the general shock absorber (it is too late to arrange the line when hitting the ball continuously, and the shock absorber will fall off due to excessive force and loose line). It is recommended to use rubber bands, rubber tubes and other shock absorbers that can be tied to the line.
Power level:
The greater the strength, the smaller the strength, and the smaller the strength, the more you need to exert yourself. Let's do our best.
Generally speaking, this is an index closely related to racket weight and swing weight. A remake requires a fast swing speed. Why? Because the swing is not hard enough, the speed is not fast enough, and you can't play a good ball without strength. So the weight and swing weight determine your swing speed.
The swing weight is small, the swing speed is moderate, the strength is small, and there are many levers, which is suitable for leisure playing.
Grip type (original grip model): Syntec grip.
What's the use? If you like the angular feeling of the handle or want to increase the thickness of the handle, you can change it into calf leather, but the price is very expensive, so novices don't have to. Some of them are easy to shoot, such as N90 in calf and shin. Other inner handles are also thickened for shock absorption or quick drying and sweating. In principle, it is possible to replace the outer handle. Generally, it is not necessary to replace the skin of the inner handle.
Handle size
Watch your hands. One finger is the best. Look at the picture!
Note: the master who pursues topspin will choose a smaller handle to facilitate wrist rotation, but novices or unskilled people should not pursue wrist paddling too early!
String type: 16 main line (vertical line)/19 cross (horizontal line).
Remember, the fewer vertical lines, the better the topspin effect, and vice versa. 16* 19 is the mainstream today, but 18*20 still occupies a part of the market. For example, Hyde's prestige and Deng Lupu's 200G still occupy a special market. Safin used his natural quality to play a very strong topspin with a racket with a small racket bed. It can be seen that the technical advantage is far above the beat!
By the way, the line is sparse, the racket face is shot in MP or OS, which is easy to run, and the small racket face has relatively few tight line beds. If you especially don't like the whole thread, go to polyester thread. If you are a master who often knocks away the hard line of Lux waves, it is recommended to change to a racket with a small face.
String tension: 53-63 lbs.
Non-Luxbo hard line should be adjusted according to the recommended median value of the beat and then according to the feel. Increase the strength, reduce the number of pounds, want to control, increase the number of pounds, and adjust 2-3 pounds at a time.