The wheel diameter is less than 6 inches, using double-stranded drive, the ratio of double-stranded : for 35 and : 9, the chain turn round, a four wheel switch laps, riding them more lighthearted.

• 车轮直径不超过6英寸，采用双链传动，双链比为：14：8和35：9，链条转一圈，车轮转四圈，所以骑起来就比较轻快。