This is your basic, workhorse tube featuring a durable 0.9mm wall thickness. Two valve options: Presta and Shrader. The presta valve features a removable valve core, and a 48mm valve length which will fit most rim depths. The Shrader valves are a wider valve stem, so please ensure your rim is drilled to accomodate Shrader. Shrader valves do not have a removable valve core, and are available in 32mm and 48mm lengths.