... kinds of semi trailer axle are available, such as BPW type axle, American axle, inboard drum axle, outboard drum axle, Spoke axle(spider axle), concave axle, low loader axles ... :www.pcmk-auto-parts.com;www.nbpcmk.com Ningbo Pacemaker Auto Parts Manufacturing Co., Ltd Ningbo Pacemaker International Trading Co., Ltd American16T Trailer axle