POM Wheel Kit for ELEGOO Neptune 3/4 Series

POM carriage wheels on sealed ball bearings — a wear item that flattens out after a season of heavy printing. Worn wheels announce themselves: the carriage rocks on the extrusion, horizontal banding creeps into the walls, you hear a knock when you wiggle the toolhead by hand, and the eccentric nut needs retightening more and more often. Replace them a full axis at a time; swapping one wheel is pointless because the rest are just as worn. These are aftermarket wheels from third-party sellers, not an ELEGOO factory part.

Specifications

• POM body on sealed ball bearings, chamfered profile for V-slot rails
• Listings ship 4 to 6 wheels — that's the 2x price spread, check the count
• Drop-in on the stock eccentric nuts, no mods needed
• Aftermarket wheels, not an ELEGOO original

Compatibility: ELEGOO Neptune 3, Neptune 3 Pro, Neptune 4 and Neptune 4 Pro. Some sellers also list the Neptune 3 Plus, 3 Max, 4 Plus and 4 Max — same extrusion profile, but match the wheel against the listing photos and confirm how many come in the pack.