Tubes Cycling, Outdoor Recreation, Sports & Outdoors, Tires & Tubes, Venzo Venzo 10x Road Bike Tire Inner Tubes 700×18/23c or 23/25c Review by Coyotea June 29, 2018 No Comments Package of 10 Venzo Road Bike Inner Tubes Specifications: Inner tube spec Material: BUTYL Spec: 700×18/23C; or 700×23/25c Valve: Presta (French) F/V 32mm, 48mm, or 60mm Packing: 10 PCS Made in Taiwan Note: please use wheel tapes.