Abstract: An extension handle apparatus is provided for a wheeled chair which includes handle support tubes for supporting one or more wheeled-chair handles. The extension handle apparatus includes an extension support portion and an extension handle portion connected to the extension support portion. A pair of clamping plates are provided, wherein each clamping plate includes an extension-support reception region and a wheeled-chair-handle-support-tube reception region. Clamping fasteners are connected between the clamping plates, and a retention assembly is connected between the clamping plates for retaining the clamping plates in opposite positions with respect to each other. The wheeled-chair handles are a fixed distance from the wheeled chair. By using retrofitted extension handle apparatuses of the invention attached to the handle support tubes on the wheeled chair, the effective distance of extension handle portions from the wheeled chair can be adjusted as desired.