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Your cart is empty.83° Aluminum 8.3mm Hole Diameter - Racing Angled Valve Stem - Black - Package of 2 Ultra light weight valve stem, for when only the absolute best will do in a valve stem. These are the same valve stems used by Ducati and sold under the Ariete brand name. Compare these very hard to find valves that sell for over $35 a pair. $1 of every order goes to the Road Racing World Airfence fund * 2 Valves per package. * Valve weight: 12g * Made in Italy. * Valve angled at 83° for easy access for inflating and checking tire pressure. * Body made of all aluminum construction. * Fixed to the rim with a locking nut, so it can not be bent or come free of your rim. * Air Valve does not open at high speed due to centrifugal force as do inline valves. Fitting: Fits Rim Openings of 8.3mm / 0.357in * 8.3mm / 0.357in fits specific Italian wheels, please check carefully to confirm you required this smaller size. * Fits: Cerchi Antera, Marvic, Marchesini, OZ Racing, Brembo. Assembly Instructions: 1. Clean both valve housing and inside and outside of valve stem hole on rim. 2. Insert valve onto rim, taking care not to damage the gasket at the base of the valve stem. 3. Attach the nut on the inside of the rim to the valve stem threaded body. 4. Set valve stem torque to 7Nm to 10Nm.