All - be aware that Testa does a poor job in tightening lug nuts out of factory. Also, it does not provide a wrench to do it in the middle of the road. If you hear increasing roaring noise, stop immediately and check if any of the wheels is loose. In my case I found 4 (!) more loose lug nuts in addition to the 5 on the rear wheel that was about to take off. It's best to check all wheels while in the garage.