Polaris Genuine OEM Wheel, Double Side, 39-410

The Polaris 39-410 is the genuine OEM double sided wheel for the Polaris 3900 Sport, also sold as the P39. The cleaner runs two of them.

Bearing note

The source carries two readings here. Older listing text describes the part as a replacement wheel with bearing, while a manufacturer note states that as of September 2016 this wheel no longer comes with the bearing. Plan on sourcing a bearing separately unless the one in your old wheel is still smooth.

When to replace it

Wheels are a wear item on any cleaner that spends its life dragging itself across plaster or tile. A wheel that has gone oval, lost tread or picked up play at the hub changes how the machine tracks, which is what leaves the same patch of floor dirty week after week. Since the cleaner takes two, it is worth inspecting both while you have it out of the water.