A rim (1) of a tire wheel (TW) comprises a drum (1a) and inboard and
outboard tire bead sheets (1b, 1c) extending radially from both sides of
the drum (1a). A bead portion (3a) of a pneumatic tire (3) is press
bonded to the outboard tire bead sheet (1b). A pneumatic tire pressure
sensor (2) is fixed to the rim (1). When the pneumatic tire (3) is
mounted on the tire wheel (TW), or when the pneumatic tire (3) is removed
from the tire wheel (TW), a protector (4) which is fixed to the rim (1)
protects the pneumatic tire pressure sensor (2) such that the bead
portion (3a) removed from the outboard tire bead sheet (1b) does not
interfere with the pneumatic tire pressure sensor (2).