Rabaconda Dirt Bike 28mm Adapter Spindle The 28mm adapter is designed to fit the standard 20mm Rabaconda centre spindle, ensuring wheels with hub bearing diameters of 28mm and above stay perfectly centered. Crafted for compatibility, the Rabaconda Dirt Bike tire changer initially includes a 24mm adapter, making this accessory essential for broader application. Features: Adapter slides over standard 20mm Rabaconda center spindle Keeps wheels with 28mm (and above) hub bearing diameter centered