1. 16 balloon tires in mostly used on hand beach carts , wheelchair , fishing cart and many other tool carts .2. 16" Diameter and 8.3 '' wide makes the cart easy to push, pull and roll on soft sand3. Many optional bushing size to fit your axle of cart :φ8
housing and arms: Si9Cu3 Aluminum alloy die-casting ADC12pulley: powder matallurgy or forging 45# carbon steel or stretching steel or PA66 plasticbearing: China C&U