A hollow wall composite tube for improving performance in sports shafts and lightweight structural members is disclosed that includes: a constituent tube, for forming the wall, that comprises: a flexible core component, for providing an adjustable shape on which to wind or braid filaments or fabric; and an adjustable shape hollow structure, for reducing weight, providing a path for the core to be evacuated, tightly conformed to the core, and tow, braid filaments or fabric, for providing a reinforcing fiber matrix for saturation with epoxy, spirally wrapped, applied or braided on the constituent tube. Methods of producing contemplated composite tubes are also disclosed.