Abstract: A bicycle carrier which is detachably mounted to a roof rack of a motor vehicle. The carrier includes clamping assemblies which receive the cross members of the roof rack. The clamps include manipulable nuts for adjusting the clamping force with the cross members. The clamp assemblies are attached to cross bars which support wheel trays that nestingly receive the rear wheel of the bicycle and provide stability to the bike. A fork clamp is positioned at one end of the tray for lockingly receiving the front fork of the bicycle. The front wheel is stored in a rack mounted to the carrier frame.