a wheel that is not driven (uncoupled and can run freely, unlike a coupled or driving wheel);a running wheel and their axle may be called a carrying axle;referred to as leading wheel (at the front), or a trailing wheel (at the rear of the locomotive)
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APA4ort.xyz Knowledge Graph. (2026). carrying wheels. Retrieved May 7, 2026, from https://4ort.xyz/entity/carrying-wheels