These 65.5mm universal swing shafts are a premium upgrade designed for Kyosho RB6 and RB7 series 2WD buggies, as well as other compatible off-road vehicles. They are engineered to replace standard dogbone driveshafts, providing significantly smoother power delivery and reducing drivetrain binding, especially when the suspension operates through its full range of travel. Constructed from high-strength steel, these shafts ensure exceptional durability and consistent performance, making them ideal for competitive racing environments where efficiency and reliability are paramount for maintaining rear traction and control.