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First wheel made from a cut log with a hole in the middle.
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The first wheel with a spoke was made. Used for chariots and ancient inventions.
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Wheels began to have an iron rim. Giving the wheel greater durability and attraction.
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The first wire-tension spokes were made for bikes because the previous spokes weren't strong enough to fit them.
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The first air-pumped tire was made. It made the passenger's ride more smooth when riding over rocks or bumps.
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The welded steel spokes were made to improve the durability of the wheel.
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The ''Tweel-Wheels" helped merge the wheel and the tire without the use of air.