Abstract: A tire monitoring system with mounting features on a housing provide for positioning through a wide range of angles. Accordingly, the system can be positioned on an a variety of wheel rim/valve combinations. The tire monitoring apparatus includes two opposed wings provided on the housing to facilitate the range of positioning angles at which the housing can be positioned with respect to a valve base. Each opposed wing has a same exterior surface radius of curvature and the wings are clamped between a base plate and a clamp plate at the desired angle.