Bonjour mon ami, just to say that we old farts don't have to crawl around on our hands and knees to check pressures. To view the labour saving method see the photo in centre page of this months MPH and read the French Section report !! Bon chance, AlanI have a mate with them fitted to his modern Guzzii. My understanding is that they screw onto the valve stem, so they work on anything with a standard Schrader fixing. Some come with a screen to attach where it can be read while riding.
I see the greatest advantage is that us old cripples dont have to get down on our hands & knees to read our tyre pressures.