Wheel axle usually steel. Hubs are usually aluminium, with steel bearings. Spokes usually stainless steel. Spoke nipples brass. Rim usually aluminium. Rubber tube and tire, with some cloth and steel reinforcements.
Usually aluminium(alloy), but stainless steel and even regular steel either chromed or painted can occur. And these days, carbon fibre rims are not that uncommon. There are even wooden rims as well, but they're quite rare.
Professionally spokes are mostly made of stainless steel. Cheap/old bikes may have spokes of galvanized steel. Excessively expensive bikes can have titanium spokes. Carbon fibre or aluminum spokes are around, but they're rare and have questionable merits.
Making spokes yourself is pretty much out of the question. The heads are forged/stamped with a very special tool and the threads are rolled. You can get the threader but not the stamper. And given what spokes cost to buy it's even more pointless to try.
Most are made from aluminium alloy.
But you can find them in both carbon fiber and steel.
Usually rubber, although polyurethane tires are also available.
Rubber
The material that is used to manufacture Continental bicycle tires is rubber made from the Uniroyal company or other companies that specializes in supplying rubber for bicycle tires. To get a more specific answer to the question, a visit to the local bicycle shop can render an answer.
they are the tires made from EVA(ethlyne vinyl acetate), commonly used in kids bicycle and baby prams....
Not all of them have. Bicycle tires for soft/loose surfaces will have coarse treads and very knobbly patterns.But bicycle made to be ridden on hard surfaces will have very smooth treads.The main reason why car tires for road use have tread patterns at all is to avoid aquaplaning. And due to the shape and size of the contact patch of a bicycle tire, a bicycle can'taquaplane. So small/no treads will do fine.
How It's Made - 2001 Prams Factory-Built Homes Wood Flutes Bicycle Tires 20-7 was released on: USA: 13 December 2012
My first bicycle, made in the 1930's, had wooden wheel rims.
Basically, you can't. Car tires comes with year of manufacture printed (in code) on them, but no such thing for bicycle tires. What you can do is judge them for dryness, mount& inflate them, and look for cracks.
Bicycle tires can be bought and replaced easily at many biking stores. Bicycle Warehouse, Performance Bike, and Bicycle Tutor all sell replacement bike tires as well as teach one how to replace a bike tire.
Bicycle tires start at a little over 3/4 inch for high speed racing tires, going up through 1.5 inch for light road going tires to 2.25 inch for knobbly off-road tires.
When you need to inflate the tires.
Air fille bicycle tires were invented by John Dunlop.
You must be buying cheap tires. I find almost no flaws in bike tires that I use.
The Kenda Tire company is headquartered in Taiwan and makes tires in Taiwan, China and Vietnam. -I know they make great bicycle tires - some of the best ! -I have no information good or bad about their auto and specialty tires.