what kind of semi tire pressure system are theses thanks

[trentpainter]

http://i637.photobucket.com/albums/uu98/trent2002_2009/6AC9D96D-FA21-46E3-B6DB-CE66F095229C_zpsltzon1xu.jpeg (http://s637.photobucket.com/user/trent2002_2009/media/6AC9D96D-FA21-46E3-B6DB-CE66F095229C_zpsltzon1xu.jpeg.html)

[RBHSalvage]

I think that is a Meritor self inflating / regulating tire system.

[trentpainter]

okay thanks