On a bicycle wheel, the spokes are thin pieces of wire. They can’t support (very much) compression, without buckling and collapsing. They can however support lots of tension (stretching). Bicycle wheels are built to take advantage of tension rather than compression.
Which force should be more in the spokes of cycle wheel compressive or tensile?
But before you get close, the tensile force gets sufficiently greater that it will carry the wheel. So while it is conceivable that a spoke (at the bottom of the wheel, where it touches the ground) is in compression, it will not support the weight of the bike.
What are the stresses acting on the spokes of a bicycle wheel?
Therefore, spokes are subjected to tensile stress. At high speeds, there are additional tensile stress on spokes due to the centrifugal force offered by the wheel rim.
Do bike spokes push or pull?
The bicycle wheel is a hoop, or rim, with a set of spokes that connect it to a hub. Spokes pull the rim from both the right and left side. Wheel truing is the process of using a spoke wrench to change the tension of spokes to improve the straightness and roundness, or trueness, of the wheel.
How tight should cycle spokes be?
Put your thumb around one spoke and your fingers around the spoke next to it and squeeze. The spokes should feel tight and firm. They should have just a little give when you squeeze them fairly hard.
How do bike spokes work?
Starting at the hub in the center of the wheel, spokes radiate outward to the rim, where they attach to nipples, which are like little nuts that screw onto the spoke ends. Turning the nipple increases or decreases the tension of the spoke and also pulls the rim slightly to the left or right.
What are wheel spokes?
Spokes are the connecting rods between the bicycle hub and the rim. Their main purpose is to transfer the loads between the hub and the rim, which are caused by the weight of the rider and the bike. … This means the spoke on the ground has almost no load because the load is distributed among the other spokes.
Do spokes matter?
The spokes play a large part in determining the overall weight and strength of a wheel. … In truth, the number of spokes a wheel has barely makes any difference really. The impact on the wheel’s weight, strength and aerodynamic performance will be minimal at best.
Are bike spokes universal?
Spoke lengths are unique to each wheel, rim, and spoke angle (cross 2, cross 3, etc) combination. Non OEM combinations require special spokes, Buchanan Spokes is a reliable resource.
Which of the following stresses acts on the spokes of the flywheel?
Therefore the spokes of the flywheel are subjected to tensile stress.
Why do spokes not buckle?
While it’s easy to believe a bicycle spoke would simply collapse under the weight of bike and rider, he goes on to explain that the tension created in a spoke during the wheel building process (called ‘pre-tension’) is what allows the lower spokes to bear the load without buckling, as they would if there was no pre- …
How are bike spokes manufactured?
If bladed spokes are being produced, they go through one final step, called flat forging. The spokes are fed into a press and a force of up to 250 tonnes forms the bladed profile between two dies. This cold forming process again cold works the material, further increasing strength.
How do I know if my bike spokes are too tight?
Spokes that have too much tension can result in deforming and/or cracks near the nipple holes of the rim, as seen in the image below. Notice crack at red arrow. Too much tension can also lead to failure of the hub flange.
How do you tell if your spokes are too loose?
Your wheels should not rattle! It could be several things, but it’s often loose spoke nipples. (It’s what they’re called… go ahead and giggle.) If your spokes are so loose they rattle, they’re providing virtually no strength to the wheel structure.