A valve stem to be mounted to a valve mounting hole of a tire wheel includes a stem body that is pipe-shaped, contains a valve core inside, and has a proximal end to which an electrical circuit unit is fixed, and a cover member made of elastomer and covering an outer side of the stem body. The valve stem includes an engagement groove formed on an outer circumferential surface of a proximal end of the cover member to engage with an opening edge of the valve mounting hole, and a weight adjustment member having a higher specific gravity than the cover member and made of a material different from that of the stem body. The weight adjustment member is embedded in the cover member and positioned closer to a distal end of the cover member than the engagement groove.

A vehicle wheel includes a rim having mounted thereon an inflation valve and a tire. The inflation valve is extended by an inflation channel extending through the rim and opening out into a volume of gas defined by the rim and the tire. The inflation valve is arranged in the vicinity of a flange of the rim.

A vehicle wheel includes a rim having mounted thereon an inflation valve and a tire. The inflation valve is extended by an inflation channel extending through the rim and opening out into a volume of gas defined by the rim and the tire. The inflation valve is arranged in the vicinity of a flange of the rim.

A tire inflation valve having anti-rotation features has an external valve seat, and includes a valve body, a valve stem extending through the length of the valve body, and anti-rotation features disposed interior to the valve body. The valve stem is configured to move relative to the valve body, such that a resilient seating surface disposed at a proximal end of the valve stem is displaced relative to a valve seat formed by an exterior surface of a proximal end of the valve body. The anti-rotation features may include a complementary slot and protrusion, a keyway and complementary protruding ridge, and/or complementary channels and lateral protrusions.

A rim magnet arrangement for fixing on a stem of a valve. The rim magnet arrangement includes a magnet, and a fixing device, which is configured to fix the magnet on the stem of the valve in an axial direction of the stem, and an anti-twist protection, which is configured to fix the magnet in a circumferential direction of the stem.

A rim magnet arrangement for fixing on a stem of a valve. The rim magnet arrangement includes a magnet, and a fixing device, which is configured to fix the magnet on the stem of the valve in an axial direction of the stem, and an anti-twist protection, which is configured to fix the magnet in a circumferential direction of the stem.

A tire valve includes a grommet fitted on an outside of a valve stem on a proximal end side, the tire valve being inserted into a valve attachment hole from a distal end side, the grommet having a proximal end portion engaging with the valve attachment hole, a stem step portion provided on an outer surface of the valve stem and increasing in diameter at the proximal end side and facing toward the distal end side, a ring provided on the grommet in a portion on the distal end side of the stem step portion and restricting axial movements of the ring relative to the grommet, and a pressed portion provided on the grommet between the stem step portion and the ring to be pressed between the stem step portion and the ring wherein the grommet receives a load applied toward the proximal end side of the valve stem.

A tire valve includes a grommet fitted on an outside of a valve stem on a proximal end side, the tire valve being inserted into a valve attachment hole from a distal end side, the grommet having a proximal end portion engaging with the valve attachment hole, a stem step portion provided on an outer surface of the valve stem and increasing in diameter at the proximal end side and facing toward the distal end side, a ring provided on the grommet in a portion on the distal end side of the stem step portion and restricting axial movements of the ring relative to the grommet, and a pressed portion provided on the grommet between the stem step portion and the ring to be pressed between the stem step portion and the ring wherein the grommet receives a load applied toward the proximal end side of the valve stem.

A tire inflation valve having anti-rotation features has an external valve seat, and includes a valve body, a valve stem extending through the length of the valve body, and anti-rotation features disposed interior to the valve body. The valve stem is configured to move relative to the valve body, such that a resilient seating surface disposed at a proximal end of the valve stem is displaced relative to a valve seat formed by an exterior surface of a proximal end of the valve body. The anti-rotation features may include a complementary slot and protrusion, a keyway and complementary protruding ridge, and/or complementary channels and lateral protrusions.

A valve stem support apparatus for supporting a valve stem while attached to a pump includes a bracket having a bracket top side, a bracket right side and a bracket left side. The bracket top side has a valve aperture extending therethrough. The valve aperture slidingly receives a valve stem of a tire of a bicycle. Each of the bracket left side and the bracket right side has a screw aperture extending therethrough. A receiving distance between the bracket right side and the bracket left side is wider than a rim of the bicycle. A pair of thumb screws is coupled to the bracket. The pair of thumb screws is threadingly engaged with the screw apertures of the bracket left side and the bracket right side to engage the rim of the bicycle and secure the bracket.