A modular rigid wheelchair comprised of a light weight rigid seat body module, which includes folding front wheel and castor assemblies, a detachable foot rest module which drops into receiver areas in the seat body framework, and a detachable contoured backrest module with fixed smooth curved thoracic upper backrest support, and lower separately adjustable lumbar support. Facilitating much lighter weight to be lifted into and out of a vehicle for transport, and a compact size for transport when folded.
