In addition to air-filled rubber tires, we can thank the bicycle for essential technologies like ball bearings, originally devised to reduce friction in the bicycle’s axle and steering column; for wire spokes and wire spinning generally; for differential gears that allow connected wheels to spin at different speeds.

And where would our airplanes, tent poles and lawn furniture be without the metal tubing developed to serve as the bicycle frame? “The hollow steel tube is a great form,” said Jim Papadopoulos, an assistant teaching professor of mechanical and industrial engineering at Northeastern University in Boston. “It’s tremendously structurally efficient, light and strong, and it came into being for the bicycle.”

 

The New York Times