Abstract: An agricultural wheel assembly constructed of a plastic wheel half and a metal half releasably secured together for use with agricultural row crop planters and grain drills. The plastic wheel half has a smooth flat or shallow cup for eliminating the problems related to "rooster tailing". The metal wheel half having a deep cut configuration for clearance when mounted on the agricultural equipment and exhibiting structural strength above and beyond that of the plastic wheel half. The wheel halves are releasably but tightly locked together. An improved clincher base tire for the plastic-metal wheel assembly having an offset tire lip for depth/gauge control and a base having a dependent nose adapted to be snugly received at the juncture of the wheel halves for substantially eliminating soil infiltration between the tire and the wheel assembly when mounted on the plastic half.