This 30mm straight bore tire changer duck head is designed to replace a worn or damaged mount and demount head on compatible tire changing machines. It fits straight, non-tapered mounting shafts with an approximate diameter of 30mm. The metal head provides reliable support during tire mounting and removal, while the replaceable nylon contact inserts help reduce direct metal contact with the wheel rim. Replacing the complete duck head can help restore normal tire changer operation without replacing the entire mounting assembly. Compatibility depends on more than shaft diameter. Before ordering, please compare the bore type, mounting direction, locking-hole position and overall profile with your original part. This product is intended only for compatible 30mm straight-shaft tire changers. 30MM STRAIGHT BORE DESIGN: Designed for tire changer mounting shafts with a 30mm diameter straight, non-tapered profile. Confirm both the shaft diameter and bore type before ordering. REPLACEMENT MOUNT AND DEMOUNT HEAD: Replaces a worn, bent or damaged tire changer duck head and helps restore normal mounting and demounting operation. NYLON RIM PROTECTORS INCLUDED: Replaceable nylon contact inserts help reduce direct metal-to-rim contact, scratches and scuffs during tire service. DURABLE METAL CONSTRUCTION: Made from heavy-duty metal for reliable strength and repeated professional workshop use. CHECK FITMENT CAREFULLY: Compare the shaft diameter, bore shape, locking-hole position, mounting direction and overall profile with your original part before purchasing. We also provide other accesories in our store as .