Tire Changer Mounting Head Insert

A tire changer mounting head insert is a small, replaceable piece, usually molded from nylon or a similar tough polymer, that fits into the mount/demount head (often called the duckhead) of a tire machine. The steel head does the work of lifting the tire bead over the rim flange. The insert acts as a sacrificial buffer between that hardened metal and the wheel's finish. Because it takes the wear, it is one of the least expensive parts on a tire machine to replace, and one of the most important for protecting expensive wheels.

Why Mounting Head Inserts Matter

Modern wheels are far less forgiving than the steel rims of the past. Polished alloys, painted and powder-coated finishes, machined faces, and low-profile fitments leave very little margin for error. Bare metal touching a rim during a bead change can leave scratches, gouges, or dents that are difficult or impossible to repair. A fresh insert reduces metal-to-wheel contact and helps keep the job cosmetically clean.

Inserts wear down with use. Grooves, chips, cracks, or embedded grit mean it is time to replace them. A worn insert can no longer cushion the rim, and trapped debris can scratch the very surface it is meant to protect. Regular inspection is a simple habit for any busy shop or serious home garage.

What to Consider When Shopping

• Machine compatibility: Inserts are shaped for specific head designs. Confirm that the insert fits your tire changer's make, model, and head style, such as Coats stainless steel heads.
• Material: Durable nylon is a common choice because it resists wear while remaining softer than aluminum or painted wheel surfaces.
• Pack size: Inserts are sold individually or in multi-piece packs. A pack makes sense if you change tires often and want spares on hand.
• Wheel type: If you regularly service high-end alloys, low-profile tires, or run-flats, keeping the head fitted with clean, undamaged inserts is especially important.

Top Brand in This Category

Tire Mechanic's Resource is a specialist in replacement tire changer components, including nylon mount/demount heads, inserts, and rim protectors made to fit popular machines from manufacturers such as Hunter, Coats, and others. Its nylon inserts are designed to fit Coats stainless steel mount/demount heads and are typically supplied in multi-piece packs, a practical format for shops that need to keep spares on hand to protect wheels during tire mounting and demounting.

Keeping Your Tire Machine Wheel-Friendly

Pair fresh inserts with good technique: lubricate the bead properly, position the head correctly relative to the rim edge, and keep the work area free of dirt and metal shavings. Together with quality replacement parts, these habits extend the life of your equipment and reduce the risk of costly wheel damage. If you are outfitting a tire service area, also browse related tire service tools and equipment to keep your whole setup in good working order.