Extreme Gears are objects that appear in the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing. It is a term used to describe various airborne vehicles designed for speed and versatility. They are popular with various factions.
Extreme Gears come in a variety of sizes and shapes, although most of them generally resemble airboards. Being hovercrafts, they can fly through midair (either just above the ground or through the sky) at incredible speeds.