What practical difficulty often caused many cyclists to stick with fixed-gear bikes for decades?

Answer

The mechanical complexity and unreliability made gears too difficult for everyday, low-cognitive-load use.

Even after multi-speed systems like the derailleur emerged, they were prone to issues such as the chain jamming between gears, dropping off the sprocket entirely, or requiring the rider to stop pedaling entirely to shift without causing damage. This mechanical difficulty and complexity meant that operating a geared bike required a higher degree of focus and skill compared to a simple fixed gear. For many utility and competitive riders, the simplicity, low weight, and absolute reliability of the fixed gear outweighed the benefits of variable ratios that were often frustrating to employ.

What practical difficulty often caused many cyclists to stick with fixed-gear bikes for decades?
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