It is estimated that 50% of the population in developing countries is somehow, directly or indirectly, affected by disability. This is not surprising considering the substantial gap between the 20 million people in developing countries who require the aid of a mobility device and the roughly 1% who have access to them. There are many organizations working to alleviate the mobility problem by donating new or used Western-style wheelchairs to developing countries. However, there are often many hidden problems associated with this approach, as the physical, economic and cultural environments of the end users are not considered leading to a poor transfer of technology. Consequently, there is still a definite need for the design of low-cost, appropriate mobility technology that addresses the specific needs of those in rural and low-income regions. Therefore, a simple, low-cost mobility device was developed for use by people with lower-extremity disabilities living in India. This device is intended for mid/long range travel in a rural environment and aims to provide a stable, comfortable and robust alternative to the ill-suited standard wheelchairs. The device was named the GADI 2004 (a Hindi/Guarajati word that is loosely translated to mean anything with wheels that moves) after the original low-height, short-range design by John Lysack in 1996. This thesis outlines the design and development of this device from its conception to the final design proposal.