A wheel assembly for use on a race car. The wheel includes a center piece having an outer portion adapted for attachment to a rim portion of the wheel, a hub portion adapted for engagement with an axle of a race car for mutual rotation therewith, and a transitional portion integrally interconnecting said outer portion and said hub portion. The hub portion is axially offset from the outer portion in a direction toward the axle. In one embodiment, the transitional portion includes a radiused transition area between the outer portion and the hub portion. In a second embodiment, the transitional portion includes an arcuate member extending from the outer portion to a substantially axially centered area on the hub portion. Radially extending webs may be provided for reinforcement between the hub portion and the outer portion. One of the disc and transitional portions defines a plurality of lightning holes therethrough.