Abstract: A light weight foldable and customizable wheelchair (4) is described. It is comprised of a tubular frame (9) formed at least in part of molded polymer matrix composite material tubes and connectors. The wheelchair has two side frame tubular assemblies (9, 9?) interconnected in side-by-side relationship by a pair of cross-brace (8, 8?) members. The side frame tubular assemblies define a seating section (6) therebetween. A rear wheel mounting post (80) is secured to each of the side frame assemblies adjacent a rear end section thereof for securing a rear wheel (86) to each of the side frame tubular assemblies (9, 9?) at a desired selected position. A front wheel assembly (7, 7?) is secured to a lowermost front end of each of the side frame tubular assemblies. The seating section (6) is configurable along three axes.