The Tubo-CX/Gravel is twice as robust as standard tubes. And at the same time, due to its low weight of 60 grams, it guarantees twinkle toed rides. The 50% smaller packed size makes it also a spare tube which fits in every pocket. - Tubo series tubes are intended for every day use - Easy to install and serves as a lightweight alternative for tubeless riders - Designed for rim and disc brake use Specifications: - Labeled Size: 700 x 30 - 40 - ISO Width (mm): 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 - ISO Diameter: 622 / Road / 29" - Shaft Type: Smooth - Valve: Presta Long 56-74mm - Tube Compound: Thermoplastic Elastomer