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2.3 Interchangeable Valve Stem (IVS) Description
The Tuson TPMS’ tire sensors use a metal interchangeable valve
stem (IVS) that is designed to fit through either 0.453" or 0.625"
diameter wheel valve holes for your convenience. The IVS is
compatible with both steel and aluminum wheels. The valve stem
and nut portion of the IVS are made of brass and the washer is
made of nickel-plated steel. A polybag containing the IVS comes
pre-assembled with the 0.625” diameter rubber grommet; metal
washer; 0.625” diameter nut and valve cap on the valve stem. A
0.453” diameter rubber grommet and nut are also included in the
polybag for each IVS. The IVS should be installed in the wheel
using a single rubber grommet only. WARNING! – Do not use
both sizes of the included grommets to install the valve stem. See
Section “4. TPMS Sensors Installation” on how to install the
sensors.