With the increased seam length, Goff says there was actually a risk that this ball would be too rough. “Very little changes in those textures can have noticeable aerodynamic effects,” he says. The fact that the Telstar 18 has almost the same drag curve as the Brazuca, with aerodynamic properties changing at about the same speeds, is impressive. “It has to be an engineering and technical challenge,” he says.
Although the length of kick may end up being a little shorter, the changes make the Telstar 18 more balanced, says Alam. On other balls, Alam and his team have found that there is a difference in how the ball flies based on where it’s kicked in relation to the seams. His tests have found that the Telstar 18 ball doesn’t have as much variation. The total length of seam of the Telstar 18 is 14.1 feet, 3.28 feet more than on the Brazuca. With the longer seam, and more symmetric panels, no matter how the ball is turned there is the same amount of seam exposed. “The other two balls were not like that, they were significantly different,” he says.
A: Butyl bladders are an excellent choice for the interior of soccer balls because they create an airtight seal in the inner compartment. This helps greatly with air retention. Even better, you will not have to keep inflating soccer balls that contain a butyl bladder for the fact that they hold air much longer than soccer balls that don’t have a bladder made from butyl rubber.
All in all a street soccer ball needs to be rough and tough with all the attributes we discussed so far. Senda street soccer ball has fulfilled all these requirements, and met our expectation. We recommend you to buy this option if you want to play on street or hard surface. We found this as a good quality model with the proper construction as we discussed. The weight and bounce are also according to the requirement of a street soccer ball.
There are a lot of options available in the market. But before buying one, you need to ask yourself, whether you are going to use it for practice, official match, indoor playing, street playing or playing on the beach. You also need to know the actual size you need. We tried to cover all these topics including the construction of a ball so that you have the idea of the different materials that are used to make it, and which material plays what type of role in the performance of your best buddy on the ground. Hope you enjoyed reading our detail reviews and soccer ball buying guide. Now it’s your turn to take the right decision.
So it is now clear to you that you won’t have to worry about the air retention capability, durability. 

Now, how good is the playability? Well, in terms of rebounding, this ball performs almost like a standard ball but obviously not exactly like standard balls. Having said that, we must say the rebound is enough for recreational play and practicing purpose. You will also find this ball a bit heavier than standard balls during the shots. That is why we don’t suggest you use this option for tournament play.
Adidas says its design was motivated by Russia's urban landscapes. It uses textured graphics and a metallic sheen to bring a modern look to the classic design. The ball is made of six panels of thermally bonded TPU and about 15% silicone. The materials allow for better trajectory, accuracy, responsiveness, and low water absorption. It also feels well-padded and slightly lighter than previous match balls.
On the other hand, replicas (sometimes called training balls or gliders) are designed to be just like the official match balls but are much cheaper. Their panels are often stitched rather than thermally-bonded and are made of a different material. However, they’re not necessarily less durable than official match balls. So, they’re the recommended option for most players. https://www.youtube.com/watch?v=j2Xn84L3Kcs
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