A Cross frame is the main component of a Folding Wheelchair, onto which wheels and other components are fitted. The modern and most common frame design for an upright wheelchair is based on the safety wheelchair, and consists of two triangles, a main triangle and a paired rear triangle. This is known as the diamond frame. Frames are required to be strong, stiff and light. We do this by combining different materials and shapes. The Galaxy Lite Wheelchair uses a single aluminium cross-brace for optimum rigidity and ease of folding.