Riteda Machinery Co., Ltd is a professional manufacturer specialized in producing semi-trailer spare parts, such as air suspension, mechanical suspension,landing gear, axle, torque rod, u-bolt, bushing,king pin and fifth wheel. The OEM service are provided. Up to now,we have emerged as leading manufacturer of trailer parts in the north of China. 90 per cent of our products are exported to America, Europe, Africa and Middle East etc.