Because before the days of big milling machines and huge lumps of aluminum the most available way of making wheels that were true, strong and reasonably light was by using spokes to lace a rim to a hub.
For bicycles, with their relatively large diameter and lightly loaded wheels, the method is still competitive.
Spokes are found as part of wheels, for instance on a bicycle. They connect the hub to the rim.
Without spokes, wheels would have to be made from solid discs.
The wheels
"Spokes" are the things that branch out from the centre of wheels to the outside edge of the wheel, to stabilise them. So wagon spokes are the things that branch out of wagon wheel centres (usually wooden, in this case). Bicycle wheels also have spokes.
There are mainly two types of spokes used in bicycle wheels: straight-gauge spokes and butted spokes. Straight-gauge spokes are uniform in thickness throughout, while butted spokes are thicker at the hub and thinner at the rim. Butted spokes are lighter and more flexible, providing a smoother ride and better shock absorption. They also tend to be more durable and less likely to break compared to straight-gauge spokes. The choice of spokes can affect the overall performance of the bicycle in terms of weight, strength, and ride quality.
360 / 15 = 24 spokes
A hub is the center piece on your wheels that the spokes are connected to. it spins your wheels. if you dont know what spokes are they are the stick looking parts on your wheel.
There are mainly three types of spokes used in bike wheels: straight gauge, butted, and bladed. Straight gauge spokes are the most basic and durable, but heavier. Butted spokes are lighter and more flexible, providing a smoother ride. Bladed spokes are aerodynamic and reduce wind resistance, improving speed. The type of spoke used can affect the overall performance of the bike in terms of weight, flexibility, aerodynamics, and durability.
There are mainly two types of spokes used in bike wheels: straight-pull spokes and J-bend spokes. Straight-pull spokes are more aerodynamic and can provide better stiffness, while J-bend spokes are more common and easier to replace. The type of spokes used can affect the overall performance of the bike by influencing factors such as weight, aerodynamics, stiffness, and durability of the wheel.
"Spokes" are the things that branch out from the centre of wheels to the outside edge of the wheel, to stabilise them. So wagon spokes are the things that branch out of wagon wheel centres (usually wooden, in this case). Bicycle wheels also have spokes.
Bicycles need a reflector on the spokes of the wheels.
This completely depends on the wheel. The most common number of spokes per wheel is 36. Some better wheels have 32. Higher performance wheels have even less.