NEW AND IMPROVED EVOLUTION X Wider axle to make room for wide boards New larger and thinner arch to handle even larger boards Larger arch to accommodate thinker inflatable boards Adjustable to spread wider for even wider boards Adjustable by removing part or all of the spacers outside of the arch Extra S-Hooks on bungee for longer extension around fin Holes in axle part to accommodate other types of longer bungees 1 year warranty 30 day return policy Board types and the associated model. Move forward faster with SUP Wheels@ Evolution-X for Inflatable boards