Thule foot packs and fitting clamps are the key components that connect your roof bars securely to your vehicle. Whether you’re replacing parts from an existing setup, changing to a new car, or building a complete roof rack system piece by piece, choosing the correct foot pack for your vehicle’s roof type is essential for a safe and secure fit. If you require a new setup with all the parts to fit your vehicle, then buying a complete Thule top rack package will normally be cheaper.