I would think everybody knows about these. But here in Oz trying to check tyre pressure at the garage is a pain in the :edit:ss. With the valves sticking up. I can never seem to get the auto checker style hose on the bloody thing. I got these L shaped valves put on when I got my new Metz, now no more wedging the hose between the axle and valve.Total Cost $80.00 installed for both wheels. Well worth it I thought, and they look good. Note to the wise....don't go for the cheapy rubber ones, they have nothing but trouble with them.