Self Propel Drive S1 Self Propel Steel Wheelchair D3-CS1142SPMAG The S1 Steel Wheelchairs, both Transit (CS1142T) and Self-Propel versions (CS1142SPMAG) are crash test compliant and suitable for use as a seat in a motor vehicle as per ISO 7176-19. Please select at check-out if you qualify for VAT relief. View