The other day, I was driving through Odem, Texas and was passed by a Setra bus operated by Omnibus Mexicanos bus line. On each of the wheels was an arm that appeared from under the body of the bus and reached down to a device on the hub of each of the six wheels. I later saw this on another Setra bus operated by the same bus line.
Here is an album of pictures that I found on Webshots (The picture was not taken by me and does not belong to me.) This shows those arms rather clearly. This webshots user has other pictures of Omnibus Mexicanos buses that show the same things. He even shows them on Setra and Volvo buses.
I went to the Setra website and there is no mention of an option that matches this description.
Thanks. This board never ceases to amaze me. I even watched the video on the distributor’s website.
On the first bus I saw with this system, however, I am nearly certain that the arms were pumping up and down as the wheels were turning. It was this flashing that caught my eye. I couldn’t really stare at it since I was busy driving my own bus at the time and trying to keep the larger bus’s slipstream from blowing me off the road. Could this be a system that was improperly installed?
When I was in Brasil I noticed most (all?) truck and buses had these and had to ask what they were - does anyone know if they are legally required in some countries and if so why?
I asked this question a couple of years ago, complete with a link to photos I took in Brazil.
The answers pretty much agree. I see that this time, Q.E.D has become more definitive and stated the answer with firmness, and an even better link than before – the photos at the bottom of the page look exactly like those in my picture.
Ale, I don’t find the question surprising, as I have never seen these devices on an American vehicle.