What Our Gearhead® Experts Are Saying:"The Hydra2 Freehub Body Complete Kit makes hub maintenance a breeze. Whether I’m swapping drivetrains or replacing worn components, this kit includes everything I need—pawls, springs, and bearings. The CNC-machined aluminum body is built to last, and engagement stays crisp no matter how hard I ride."The Hydra2 Freehub Body Complete Kit is the key to maintaining peak hub performance. Designed for seamless compatibility with Hydra2 hubs, this kit includes everything we need to replace or upgrade our freehub system. The CNC-machined aluminum body ensures durability while keeping weight low, while high-quality bearings and springs maintain the legendary 0. 41° engagement Hydra2 hubs are known for. Whether we’re upgrading to a new drivetrain or refreshing well-ridden components, this complete kit restores smooth operation and instant power transfer. Available in XD, MS, and HG driver options, it’s built for every style of riding, from enduro to downhill to dirt jumping.