Rock Shox: Few things would upset Newton more than the Monarch XX. Simply put, no other shock packs more energy-efficient performance in a lighter weight package – one that seemingly defies Newton's so-called laws of physics. But the Monarch XX does exactly that, providing the ability to lock-out rear suspension via a single bar-mounted XLoc Sprint button.The 100% hydraulic remote lever and system is completely sealed, so unlike cable-actuated units – Monarch XX is impervious to contamination. If Newton were alive today, we doubt he'd be that stoked to go back to the drawing board with his theories. But a few miles on the Monarch XX sure would help inspire a new way of thinking, and riding.