As recently announced, our best-selling Ultimate Ride kits now have TUV approval. According to TUV regulation, an air pressure gauge must be installed together with the Arnott Motorcycle kit. A bike owner is free to choose any pressure gauge for the TUV. Nevertheless, we do recommend using our digital pressure gauge K-3114 (black) or K-3115 (chrome) with our motorcycle kits as they have been certified for this purpose. Please be aware that the pressure gauge is not part of the motorcycle kit and must be purchased separately.