... Heavy/ light duty truck, 3)Including leaf spring, axle, etc. Semi Trailer Axle Wondee Autoparts supplies spare parts for: We can supply ... including steering axles, driving axlesand semi-trailer rear axles. The designated productive capacity of axle is 50,000 pieces per year. ... Unique one-piece, special heat-treated, low-alloy steel axle beam(3)greater capacity, superior fatigue capability(4)more ...