MICHELIN Heavy Duty Inner Tube - 19" - TR-4 - Center Metal Valve 32403Inner Tube Heavy Duty 19" TR 4 Center Metal Valve The MICHELIN Heavy Duty Inner Tube, part number 32403, is designed for those who demand quality and reliability in their cycling experience. Crafted with a focus on performance, this 19 inch inner tube features an innovative overlap splice that enhances strength compared to traditional butt splices. This unique placement opposite the valve helps to maintain a well balanced tube, ensuring a smoother