... :311x190mmBearing:best in ChinaTube:round 127mmTrack:1850mmSpring center:1000mmAir chamber center:450mmStud:10pcs,220x15mmrim:6.5-15,17. ... series axles, Mechanical suspensions, Bogies, Tandem pedal axles, Air suspensions, Landing gears, Fifth wheel ,King pins and other ... axle hot rolling line, axle digital machining line, air suspension production line, automatic painting and drying line and ...