Modular PDU wheel assembly

A modular wheel assembly for a power drive unit (PDU) may comprise a hub and a disc stack coupled to the hub. The hub may be a splined hub defining a plurality of spline recesses. The disc stack may comprise a plurality of discs. Each disc of the plurality of discs may comprise a ring having a plurality of splines that are complementary to the spline recesses, and that are configured to interlock with the spline recesses. Each disc may further comprise an annular segment made of one of a first material and second material. The annular segment may be a tire. In the event of damage or wear, each disc in the plurality of discs may be removed and repaired or replaced.