The fourth generation of Revo® SX delivers the most powerful, durable, and highest performance SX yet. The improved DuraClutch™ design along with an upgraded Infini™ brake system result in smooth engagement along with effortless casting performance. The D2 Gear Design™ paired with a brass main gear delivers the ultimate in durability and efficiency resulting in less effort and more power. Revo® SX is topped off with the keyed Power Stack Carbon Matrix Drag System™.