Designed a wheel adapter for Otang Dadbod core pattern to run on the Bioboards gear drives. Uses a 1/4-20 bolt for the exterior studs and M5x0.8 for interior studs. The design and pattern can also be easily adapted for belt drive pullies. Achieves a near perfect friction fit with the wheel core without any additional tuning needed, and the studs are tightly toleranced to the printed adapter.