The current invention provides a controlled release oral solid formulation of levodopa comprising levodopa, a decarboxylase inhibitor, and a carboxylic acid. The separation pattern is transferred to a membrane, such as a sheet of nitrocellulose, and a plate with a set of separate, side-by-side slots is then applied to the membrane. The bicycle also includes a torque element that is secured to the first end of the axle and that is shaped to fit within the recess of the first dropout to inhibit rotation of the axle relative to the frame in response to torque from the motor.