1, speed: double-row is as fast as single-row on the smooth wooden floor indoors.

2, fitness: double row is sensitive to the development and balance of all aspects of body organs, single row can not help you, only double row. Because single row is too easy to balance, it is not easy to fall.

3, technology: double-row master is definitely a single-row master; But a single-row player may be a double-row rookie.

4. Venue: Double row has the widest adaptability and is the most professional; Single row is only suitable for cement floor and street; In Shanghai and Beijing, large indoor roller skating rinks refuse single row because it will wear the indoor wooden floor. There are only two kinds of skating, one is roller skating and the other is real ice. Similarly, there are two kinds of the highest level skating rink, one is indoor wooden floor skating rink, and the other is indoor real skating rink. But the one-way street is exclusive in both places. )

5. Pattern: Double rows are easy to fall, single rows are not easy to fall, double rows of legs are flexible, and single rows of legs are fixed, so the bracket controls many performance patterns.

6, professional: If you want to affirm your movements, challenge more tricks and more happiness and satisfaction, single row can't help you, only double row!

7. Crowd: Double row is the hardest! ! ! It is also loved by experts. It's no fun for people who play double row to play single row. Double row is suitable for older children and adults, and single row is suitable for younger children. Roller skates are not suitable for children because they are the most dangerous.

8. Universality: The skills and methods of double-row skating and single-row skating are different. Because roller skating is almost the same as real roller skating, it can only be used as an auxiliary tool for road roller skating training. You can't take your platoon to the wooden floor to play, let alone take your platoon to the real skating rink. Just for the cement floor or the skating rink such as open-air tiles and marble, or even for street play.

9. Practice: Because the skating method is different, everyone will not be half-hearted when practicing double row, because it will slow down your practice.

10, cost: In-line hub is the cheapest, with average quality and minimum cost. Double-row parts are complex, with better quality and higher cost. The highest cost is roller skates, and the light field is limited to ice. It costs at least tens of dollars to enter a real skating rink! ! Especially students, not to mention running a real skating rink every day.

Novices suggest double-row pulleys.

Extended data

Roller skates are a kind of leisure sports goods, which are divided into roller skates, roller skates and roller skates. The soles of roller skates are sharp blades, roller skates have two rows of four wheels, and roller skates have a row of four wheels. Using the principle of rolling and sliding, people can slide down at high speed and make all kinds of gorgeous movements.

shopping tips

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Before learning to skate, you must first have a pair of suitable skates. How do beginners choose roller skates? Experts said that four points should be noted:

First look at whether the blade is straight.

Turn the skates upside down and lift them up, with the skates facing up and the shoes facing down. Use one eye to see if the blade is in a straight line. The straighter the blade, the better. Whether there is a deep cut on the blade, if there is a deep cut on the blade, it will affect the skating effect, so try to choose skates with shallow cuts when buying new shoes.

Second, look at the connection between skates and skates.

Generally, skates are perpendicular to them. The skates should be in the middle of the skates. The left blade of speed skating slightly deflects about 15 degrees to the right, and the right blade slightly deflects about 15 degrees to the left.

Third, see if the skates are bright.

Some skates began to rust and silver plating fell off due to poor steel or silver plating. Good skates should be bright and have no rust on the surface.

Fourth, see if the quantity is appropriate.

The number of skates must be suitable for me, neither too big nor too small. When trying on shoes, you should loosen all the shoelaces and then fasten them in turn. You must make sure that the quantity is appropriate before you buy it. Never make do with it. Experts suggest that novices don't know much about skating or skating equipment, so experts suggest buying skates in regular shops or skating rinks, because the quality and service there are guaranteed. For beginners, don't choose too expensive shoes. Domestic brands with prices around 300 yuan are more suitable.

The better domestic ice-making equipment manufacturer is Heilong Company in Qiqihar, Heilongjiang. Their skates are very famous, and many products are exported.

Five, see whether the bearing is smooth.

It is often heard that Hong Kong people call it beer clock, Taiwan Province people call it Pei Lin, and China people call it bearing. Actually, they all refer to bearings. Bearings are metal objects placed in the middle of wheels to help them turn.

A bearing should be placed on both sides of each wheel, and the middle is separated by a sleeve. Generally, single-row shoes adopt aluminum/brass spacer sleeves, and the plastic sleeves are higher; The friction of metal is small, which can give the bearing the maximum continuous rotation ability, so the wheel rotates at a higher speed.

References:

Baidu encyclopedia: roller skates