Tire valve having a stepped shoulder

The invention relates to a tire valve comprising a valve body which penetrates a bore of a rim, particularly a vehicle rim, embodies a bottom valve body section that is disposed on one side of the rim, particularly in the interior of the rim, in the mounted state as well as a top valve body section that protrudes from the rim bore, and is configured so as to cooperate with a cap nut in the area of the top valve body section. The bottom valve body section forms a stop collar which is used as an abutment for a flat peripheral section of the rim bore and widens the bottom valve body section relative to the top valve body section beyond an internal width of the rim bore (21). The peripheral section of the rim bore can be braced against said stop collar by tightening the cap nut.