TheRockShox Ultimate Rear MTB Maxle. Basic things like axles are often the easiest to overlook. Put one hand on the Maxle Ultimate, though, and youll be glad we paid serious attention to the finer details. Because one hand is all it takes to remove or install the Maxle Ultimate. And lever-placement personalization is accomplished completely without the use of tools. Available for both front and rear, Maxle Ultimate is the easiest-to-operate axle system in the world. No tools, no worries, so you can concentrate on the trail ahead.