Junior decides to revamp the Black Widow bike he recently reclaimed from Senior while OCC works on a two-bike build for John Christner Trucking. Mikey hires a personal trainer to lose weight and Rick announces his engagement.

Mikey launches a "Fill the Diaper" fundraising campaign for March of Dimes, OCC starts an eco-friendly build for CIMA Green and PJD unveils the March of Dimes bike. Meanwhile, Senior takes bold steps to reunite with his sons.