Method and apparatus for allowing a person with disabilities to learn to pedal a conventional bicycle which device also converts a conventional bicycle into an in-place exercise bike. In the bike trainer embodiment, the device allows the training wheels which are attached to the rear wheel of a bicycle to be elevated by being placed in a right and left trough of the base of the device so that the rear wheel of the bicycle is elevated off the ground and spins freely in a space between the right and left troughs. In the exercise bicycle embodiment, an adjustable rear roller assembly can be attached to the base of the device so that the rear wheel of the bicycle rests on a pair of rollers so as to allow the rear wheel of the bicycle to contact and roll on a front and rear roller so as to increase pedaling resistance while the front wheel of the bicycle is stabilized by a stand having a pair of adjustable upright members and a pair of laterally extending members for maintaining the bicycle in a stable position. Other embodiments are also disclosed.