Universal Big Hub Adapter (32 - 68 mm) for Street Bike Tire Changer. Universal adapter for single-sided swingarm wheel hubs to be used with the Rabaconda Street Bike Tire Changer. Works between 32 - 68 mm hubs. This adapter is also compatible with the Motorcycle Wheel Balancer. When using the adapter: Install the adapter on the wheel hub and tighten it by hand.