General often need to promote, such as supermarket shopping cart, logistics trolley, factory adopts super-heavy castor for 4 ~ 6 inch is better. But too much super-heavy polyurethane caster wheel diameter can make equipment centre of gravity is rising, the cost increase, so must carry on the comprehensive consideration. If the device does not need to often push, such as furniture, refrigerator, etc. , only need to move during cleaning, choose 3 inches below the super-heavy castor. / news_153。
Zhongshan Dajin caster Co.,Ltd.