The Tube Arc is the flagship of the Arc offerings. Each of the other Arcs was born out of this modular elegant design. The Tube Arc offers exceptional security, ease of use, and complete protection for the bicycle from the elements. The design was conceived to offer flexible, easy-to-install (assembled on site) bicycle parking structures with a “light” approach. The Tube Arc is adaptable from 16 bikes to upwards of 60+ per unit.