Allows for your Thule child carrier to be used on a second bike Easily move your cycling-ready carrier from one bike to another Includes: Extra Long Quick Release Skewer and hitch cup Maximum capacity for a single Thule child carrier is 75 lb (34 kg) and for a double Thule child carrier it is 100 lbs including children and cargo. Note: If you have an Internally Geared Hub, you will require an Thule Internal Hub Hitch Adapter.