1. Technological prerequisites & infrastructure
Early bicycles only became feasible once metallurgy, precision small‑part production, and road surfaces improved.
"High-quality (higher carbon) steel required for frame, chain and gears was not abundant enough and cheap enough until late XIX century." — d_silin
2. Perceived lack of societal need & unintuitive physics
Many contemporaries saw little demand for personal mobility, and the balancing act seemed absurd.
">there was very little need for personal mobility in society" — mrob
"It’s not at all immediately obvious as to why the bicycle stands upright … the bicycle sounds utterly mad." — belZaah
3. Comparative historical perspective (inventive momentum)
Inventions often stall until parallel advances converge; the bicycle’s breakthrough came when earlier tech aligned.
"It's a bit like the question of why the steam engine wasn't invented earlier…we are lucky that European aristocrats were bored and enjoyed scary proto‑bicycles." — avidiax (quoting an earlier historical analogy)