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Vittoria Ultra Light Speed inner tubes are made for pure speed. Designed to offer the lowest possible rolling resistance, Ultra Light Speed are the fastest and lightest chambers ever developed by Vittoria. They are 70 percent lighter and 14 percent faster than standard butyl chambers. They are made of thermoplastic polyurethane (TPU), which offers lower rolling resistance and lighter weight than standard butyl inner tubes. By using Ultra Light Speed inner tubes in both tires, you can save up to 160 g. That’s why Ultra Light Speed are the perfect choice for road cyclists who want maximum speed without sacrificing the convenience and ease of use of the tube tire. Because of their light weight, they require special care during the fitting process. The plastic material they are made of is subject to thermal shock. In fact, they are only compatible with disc-brake wheels, as the heat generated by the brake pads on the rim can deteriorate the inner tubes. Ultra Light Speed tubes feature a red, Vittoria-branded extendable valve with a removable mechanism. Made in Germany, the TPU material of the Ultra Light Speed is 100 percent recyclable-the valve must be cut from the chamber before disposal.