Without a crank or crankshaft; also meaning not cranky or irritable.
From crank + -less (suffix meaning 'without'). Can refer either to mechanical devices without cranking mechanisms, or to people lacking cranky temperament.
Modern direct-drive bicycles and some e-bikes are crankless designs—they eliminate the pedal crank entirely, which some cyclists find more comfortable but engineers say feels less responsive than traditional cranks.
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