Roadrunner SS is a three-wheeled racing hand propelled cycle designed for use by individuals with lower extremity, mobility, or neurological disabilities or spinal cord injury. Standard features include a 21-speed hub, a front 559 heat-treated wheel, and 20-inch rear wheels. The aluminum frame can be taken apart for travel. The cycle comes with custom length, height, width, and positioning. Other custom features are available on request, including carbon wheels and tubular tires.