Training wheels

Training wheels (or stabilisers in British English) are an additional wheel or wheels mounted parallel to the rear wheel of a bicycle that assist learners until they have developed a usable sense of balance on the bicycle. Typically they are used in teaching very young children to ride a bike, although versions for adults exist.

单词	Trainer wheels
释义	Trainer wheels 英语百科 Training wheels Training wheels (or stabilisers in British English) are an additional wheel or wheels mounted parallel to the rear wheel of a bicycle that assist learners until they have developed a usable sense of balance on the bicycle. Typically they are used in teaching very young children to ride a bike, although versions for adults exist.
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Trainer wheels

Training wheels