The IMPALAPRO Black Seal TPU inner tube has been developed to solve the most common limitations of standard TPU road bike inner tubes, while preserving the key benefits that make TPU a preferred choice over traditional butyl. Unlike ultra-thin TPU designs that prioritise minimum weight at the expense of durability, Black Seal uses premium 0.35 mm TPU combined with targeted structural reinforcements. This balanced construction improves resistance to pressure loss, valve fatigue and seam stress, delivering more consistent performance over time. At the core of the design is a fully metal Presta valve with removable core, finished with an anodized anti-corrosion coating. The valve base is reinforced with a double sealing system, including a pre-installed black rubber ring that absorbs stress at the TPU–valve interface, one of the most common failure points in TPU inner tubes. The Black Seal structure is optimised to reduce rotating mass compared to standard butyl inner tubes, helping lower rolling resistance while maintaining controlled expansion inside the tyre. This ensures stable pressure behaviour without internal tension, even at higher road pressures. Designed for 700C road use, this TPU inner tube is compatible with tyre sizes from 700x18C to 700x32C, making it suitable for modern endurance, training and everyday road setups. While not the lightest TPU option available, it offers a clear step forward in reliability and long-term durability, remaining significantly lighter than conventional butyl inner tubes. Installation is straightforward: lightly pre-inflate the tube before mounting, position it evenly inside the tyre, and inflate to the recommended pressure. Proper installation helps maximise performance and longevity. The IMPALAPRO Black Seal TPU inner tube is designed for riders who want a more dependable TPU solution—combining reduced weight, improved pressure retention and reinforced construction for real-world road cycling. Para un funcionamiento óptimo, se recomienda pre-inflar ligeramente la cámara (20–30 %, máx. 6 PSI) antes del montaje, insertar la válvula en la llanta, colocar la cámara uniformemente dentro del neumático y completar el inflado a la presión recomendada. Una instalación correcta es clave para maximizar la durabilidad y el rendimiento del TPU. IMPALAPRO Black Seal no es simplemente una cámara TPU más ligera: es una cámara TPU diseñada para durar, pensada para ciclistas que priorizan la fiabilidad, la estabilidad de presión y una experiencia sin problemas."