what is the work of the value tube in the bicycle tube
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there are several types of bike tires and rims, yet all of them share a common characteristic, a valve, which allows air to go inside the wheel and not escape in order to create a high pressure zone that helps the tyre maintain it’s shape under the riders weight, which is why heavier riders need higher tyre pressures.
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People usually think that tires are made of rubber. This is understandable, because rubber is all that you can see, but it's a serious oversimplification.
A tire is actually made up of three parts:
The beads are two hoops of strong steel cable (or, sometimes Kevlar ®.)The cords, cloth forming the body of the tire, woven between the two beads. Most modern tires use nylon cords.The rubber, which covers all the other parts. The rubber on the part that contacts the road is thicker, and is called the tread.
A bicycle tire is not airtight by itself, so it uses an inner tube, which is basically a doughnut-shaped rubber balloon, with a valve for inflation. The only requirement for an inner tube is that it not leak. Being of rubber, it has no rigid structure. If an inner tube is inflated outside of a tire, it will expand to 2 or 3 times its nominal size, if it doesn't pop first. Without being surrounded by a tire, an inner tube can't withstand any significant air pressure.
(Tubeless tires are beginning to appear on bicycles. They require the tire and rim to be air-tight, adding complications -- especially on a spoked wheel. Topic for a future article...)
A bicycle tire is not airtight by itself, so it uses an inner tube, which is basically a doughnut-shaped rubber balloon, with a valve for inflation. The only requirement for an inner tube is that it not leak. Being of rubber, it has no rigid structure. If an inner tube is inflated outside of a tire, it will expand to 2 or 3 times its nominal size, if it doesn't pop first. Without being surrounded by a tire, an inner tube can't withstand any significant air pressure.
(Tubeless tires are beginning to appear on bicycles. They require the tire and rim to be air-tight, adding complications -- especially on a spoked wheel. Topic for a future article...)
A tire is actually made up of three parts:
The beads are two hoops of strong steel cable (or, sometimes Kevlar ®.)The cords, cloth forming the body of the tire, woven between the two beads. Most modern tires use nylon cords.The rubber, which covers all the other parts. The rubber on the part that contacts the road is thicker, and is called the tread.
A bicycle tire is not airtight by itself, so it uses an inner tube, which is basically a doughnut-shaped rubber balloon, with a valve for inflation. The only requirement for an inner tube is that it not leak. Being of rubber, it has no rigid structure. If an inner tube is inflated outside of a tire, it will expand to 2 or 3 times its nominal size, if it doesn't pop first. Without being surrounded by a tire, an inner tube can't withstand any significant air pressure.
(Tubeless tires are beginning to appear on bicycles. They require the tire and rim to be air-tight, adding complications -- especially on a spoked wheel. Topic for a future article...)
A bicycle tire is not airtight by itself, so it uses an inner tube, which is basically a doughnut-shaped rubber balloon, with a valve for inflation. The only requirement for an inner tube is that it not leak. Being of rubber, it has no rigid structure. If an inner tube is inflated outside of a tire, it will expand to 2 or 3 times its nominal size, if it doesn't pop first. Without being surrounded by a tire, an inner tube can't withstand any significant air pressure.
(Tubeless tires are beginning to appear on bicycles. They require the tire and rim to be air-tight, adding complications -- especially on a spoked wheel. Topic for a future article...)
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