Willworx Superstand Racks suit all BMX, Racing & Mountain bicycles & allows safe, efficient, bicycle parking either singularly or in multiples.Modular and expandable system for displayUse Connectors (DS1354) to lock individual stands togetherFits BMX, hybrid and MTB tires up to 2.2" wideUse Poly-Foam Spacer kits to adapt to road tires (DS1357)Use Extension kits to adapt to 29er tires (DS1358)Retail version is welded, consumer version ships flat and presses togetherTop hoop press fits on to base-does not include screws