The Kalachakra (unofficially "The Wheel") is the official name of a massive spoked wheel that was built by The Venship in the early BR era after they crashed on the shores of Kiston.
About
The term Kalachakra was given to the wheel by the dark power Akasha. It was said to mean "Wheel of Time".
History
The wheel was rediscovered at the very end of the PR era by the Kistonian Institute of Strange Studies during Operation Deadbolt, where powerful bulldozer-like warforged were sent to the heart of The Crystal City to excavate below the deepest caverns. The warforged Brickhouse made the discovery, and passed the information back to the institute, who would go onto summon The Fated Five. Who, unbeknownst to anyone at the time, were the blood descendants of the original Venship.