The fastest and lightest. Made for pure speed Ultra Light Speed inner tubes are made for pure speed. Designed to offer the lowest rolling resistance possible, Ultra Light Speed are the fastest and lightest tubes ever developed by Vittoria. They are 70% lighter and 14% faster than standard butyl tubes. They are made of thermoplastic polyurethane (TPU), which offers lower rolling resistance and lightweight compared to standard butyl inner tubes. By using Ultra Light Speed tubes in both tires, you can save up to 160 g. That’s why Ultra Light Speed are the perfect choice for road cyclists that want the highest speed without giving up the practicality and ease of use of a tube tire set-up.