Challenge Superlight latex tubes are a perfect complement to any high-tpi casing tire. This tube will yield in tandem with the most supple tire casing to ensure that every last bit of ground-hugging performance and comfort are achieved without compromise. Includes a removable vavle core for adding sealant or affixing a proper extender -- nirvana. Designed for larger volume (30-35mm) applicationsItem SpecificationsWeight100gValvePrestaISO Diameter622 / road / 29"ISO Width30mmLabeled Size700x30/35cValve LengthMed 41-55mmTube CompoundLatexValve CoreRemovableValve ShaftSmooth