Rapid Fitting Kit. Thule Rapid Tracker fitting kit The kit is designed for the perfect fit to a certain car model, which results in maximum safety and ease-of-use Fitting of the kit is done with the aid of a foolproof system All Thule products come with a 5 year warranty. Please ensure you buy the correct kit for use with your Thule foot pack & bars. See Thule’s own fitting guide for guidance of fitting kit, packs and bar compatibility to your car model.