The Gravity Ring is an object that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It is an artifact of ancient Babylon that is over one thousand years old. It was originally one of two components that made up the ignition matrix of the Babylon Garden, the other being the Key to Babylon Garden.
After the ancient Babylonians settled on Mobius a millennium ago, they removed the ignition matrix and separated the Gravity Ring from the cube-base to prevent the Garden from being activated. The Ring somehow came into possession of the Battle Kukkus, and became an ancestral heirloom for them. In the past five hundred years, the ring was then passed from "father to worthy son" as a sign of succession for leadership of the Battle Bird Armada.
In the time that Grand Battle Kukku XV rose to power, he allowed the Armada's chief engineer Dr. Fukurokov to examine the Ring. He discovered the Ring could create a compressed gravity field for a brief period which enabled the bearer to ensnare a target and render it immobile. This ability aided the Battle Lord in recapturing the Babylon Rogues when he confronted them in the Gigan Mountains. Afterwards, the Battle Lord gave the Gravity Ring to Jet and Wave as part of the Armada's plan to invade New Mobotropolis during the beginning of the Ixis Resurgence, which the Rogues then used to neutralize Sonic during the Battle Bird Armada Invasion. Once the Babylon Garden was uncovered, the Rogues assembled the key to activate the Garden, only to learn that doing so would cause the creation of a black hole and destroy the planet. After a brief struggle with the Rogues and Speedy, Sonic grabbed the ignition matrix and destroyed it and the Ring into irreparable fragments, causing the Garden to crash-land and take down the Battle Fortress with it.
- The Gravity Ring is based off of the Ark of the Cosmos/Gravity Bands from Sonic Riders: Zero Gravity.