If you would rather save money and fix it yourself, caster wheels can be found at hardware stores.
如果您想要省钱，修正自己，连铸机车轮可以在五金商店。
The four caster wheels enable experienced riders (as experienced as a 5-year-old can be) to pull off a 360-degree spin.
四个脚轮使老练的车手（作为一个5岁的可以作为经验丰富的）拉了一个360度的旋转。
Caster wheels are made of superior polyurethane with strong abrasion resistance, various types such as flat bearing wheel and climbing wheel.
脚轮选用优质耐用的聚氨酯脚轮，耐磨性强，平地轴承轮，爬坡电梯轮，种类齐全。
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