A replacement duckhead can look simple, but the correct part depends on more than whether a listing says 28 mm or 30 mm. Start with the exact tire changer model, then check whether you need a complete head, a holder or flange, or only the replaceable plastic inserts.
The mount/demount head is the shaped tool that guides the tire bead during mounting and removal. A replacement must attach correctly to the machine and preserve the geometry the manufacturer intended around the rim. Two heads can share a nominal shaft size and still use different holders, flanges, fasteners or protective inserts.
This is why a marketplace title such as “28 mm universal duckhead” is not enough evidence by itself. KATOOL, for example, sells replacement steel heads in 28 mm and 30 mm versions but tells buyers to check the photos and measurements for their machine. A matching diameter alone is not enough to call the replacement an exact fit.
Ranger’s non-marring plastic tool head is part 5150523. Current Ranger material says it requires mounting flange 5150524. Current R980XR and R80EX literature lists the pair as optional equipment, and the R980DP manual also identifies the plastic head assembly.
What to check: do not order the plastic head alone if your machine does not already have the required flange.
Weaver publishes a standard steel mount/demount head, a plastic duckhead with its metal holder, and separate replacement plastic pieces. That makes “I need a duckhead” too broad: the useful question is which assembly is already on your changer and which piece is worn.
What to check: confirm the head family before ordering inserts; the insert sets are not interchangeable across every Weaver head.
Weaver part W-C-21-8000100 is a steel motorcycle mount/demount head documented for several Weaver changers, including W-M807X. Its plastic protection insert is W-C-21-8000001.
What to check: Weaver explicitly says the motorcycle insert does not fit the automotive duckhead, so the two insert families should not be mixed.
Atlas sells ATETAXP-MHPP as replacement plastic inserts for the metal mount/demount head used on standard Atlas 200/700 Series changers.
What to check: if the metal head or holder is damaged, an insert kit alone does not replace that hardware.
A steel head can be durable and may use replaceable plastic protection pieces at the rim-contact points. A full plastic or composite head can reduce metal-to-wheel contact, but it still needs the correct holder or flange and must be a documented fit for the changer. Neither material automatically makes a mismatched head safe to install.
If the existing head is intact and only its sacrificial plastic pieces are worn, replacing the inserts can be the more direct repair. If the head body, mounting collar or flange is damaged, match the complete assembly rather than buying an insert kit and expecting it to solve a hardware problem.
If you are still comparing machines, start with their published capacities and application support. If you already own the changer, use the manufacturer part information above rather than treating a nominal duckhead diameter as proof of fit.
Marketplace listings can help with availability, but match the head and holder to your exact changer before ordering.
The mount/demount head is only one place where replaceable plastic protects the wheel. The rim-protector guide also covers jaw covers, bead-breaker protectors, leverless inserts and adapter-jaw pads.
The correct mount/demount head still needs its own exact fit. If the shop also needs more help with stiff sidewalls, see the assist-arm guide. If heavy assemblies are the problem, see the wheel-lift guide.
Usually, yes. “Duckhead” is common shop language for the shaped mount/demount head that guides the tire bead over the rim. Replacement listings may also call it a tool head, demount head or mount head.
No. Shaft or stub diameter is only one part of the connection. The holder, flange, fastener pattern, head shape and insert system also need to match the machine or manufacturer-supported assembly.
No. Ranger’s current material says plastic tool head 5150523 requires mounting flange 5150524, which is sold separately.
No. Weaver separates the motorcycle-head insert from its automotive-head insert system and states that the motorcycle insert does not fit the automotive duckhead.