Convert your Gen 4 King Mountain hubs to a new Driveshell. Compatible across ISO, ISO B, Boost Centerlock, and Boost 6 Bolt hub, if they are equipped with a Gen 4 axle and adjusting clamp. This latest update to our mountain hubs uses a single axle type that is compatible with all Gen 4 mountain drivers. Installation requires a T10 Torx tool and FR1.3 Lockring tool. - Compatible with ISO, Boost, and Superboost hubs with a Gen 4 axle. - Conversion Kits include the driveshell body, O ring, inner unsealed bearing, and end cap. The rest of the driver internals can be transferred from an existing Gen 4 driver. - Available in Silver or Black. - Contact service@cosmicsports.de with any compatibility questions.