A bicycle lock system for inhibiting a bicycle from being stolen includes a bicycle that has a frame and a rear wheel. A locking unit is movably coupled to the frame and the locking unit is positioned adjacent to the rear wheel. The locking unit is positionable in a locked position having the locking unit extending through the rear wheel. In this way the rear wheel is inhibited from rotating thereby inhibiting the bicycle from being stolen. The locking unit is positionable in an unlocked position having the locking unit being displaced from the rear wheel thereby facilitating the rear wheel to freely rotate.