An adaptive mobility device enables disabled users to ambulate with more security. The device includes a frame including two rear forks for a pair of rear wheels, and a pivotable front fork and wheel, steerable with a steering mechanism that alters the front wheel angle in response to pivoting of the forearms support bar. The support bar may optionally contain forearm rests on which the user may support his or her weight while reaching the handgrips for steering the device. The steering mechanism may provide for adjustment of the steering ratio.