ContiTPU tubes use premium micrometer-thin TPU spread across seven sealed layers to enhance both airtightness and durability. These uncolored tubes avoid potential air retention problems linked to dye imperfections, ensuring top material quality. Each tube undergoes a thorough quality check after production. The valve shaft features a slightly conical base for a better fit with the wheel rim and to minimize unwanted movement. Additionally, the valve is internally threaded, accommodating valve extensions or a replacement valve core.