Manual wheelchair system for improved propulsion and transfers

A manual wheelchair comprising:

• a frame;
• a drive wheel connected to the frame, having a first axis of rotation and configured to rotate relative to the frame;
• a push rim connected to the frame, having a second axis of rotation extending substantially parallel to the first axis of rotation of the drive wheel and configured to rotate relative to the frame,
• wherein the second axis of rotation of the push rim is offset from the first axis of rotation of the drive wheel in a direction orthogonal to the first axis of rotation of the drive wheel;
• a transmission configured to transmit rotation of the push rim to rotation of the drive wheel;
• and
• a push rim repositioning mechanism configured to allow the push rim to be repositioned relative to the drive wheel, the push rim repositioning mechanism comprising a guide rail attached to the frame and a push rim axle connected to the guide rail and configured to be movable along the guide rail,
• wherein the push rim is connected to the push rim axle and configured to rotate relative to the frame.