Continental 26" Downhill Bicycle Tube is completed with a 40mm Schrader Valve, not a Presta valve. All Continental Tubes are seamless and mold cured to ensure uniform roundness and better reliability at the valve stem. Downhill Bicycle Tube's seamless and mold cured construction is for added durability. It fts size 26x1.75-2.5 Seamless, mold-cured manufacturing offers uniform roundness and enhanced reliability at the valve stem 33mm.
Continentals Unitube system allows greater compatibility with more tire sizes and fewer tubes. Every Continental Tube passes a stringent 100% quality control inspection. It is useful for adding extenders or using Revo Sealant. Its removable schrader valve is made with a butyl tube compound Threaded