MMG Aluminum Motorcycle Valve Stem &ndash; 90 Degree Angled (11.3mm) &ndash; Pair (2 Pcs) TV25AL_X2 Racetrack Tested 90 Degree Angled Motorcycle Valve Stems. Fits Rim Openings of 11.3mm / 0.453in | Light Weight: 11 Grams Each. Fixed to the rim with a locking nut, so it cannot be bent or come free of your rim. The angled approach makes getting any gauge on the stem easier. An absolute most for anyone checking tire air pressure regularly.