Product Description Specifications:Application:City & TouringETRTO:32-507 to 47-544Tyre Dimensions:24" x 1 1/4 to 24" x 1.75 x 2Inner Tube Material:butylValve Type:AV / Schrader 34 mm, DV / Dunlop 40 mmModels:24x1 1/4-1.75x2 AV / Schrader 34 mm Valve Type:AV (Auto / Schrader valve)Valve Length:34 mmManufacturer Number:0181291 4x1 1/4-1.75x2 DV / Dunlop 40 mm Valve Type:DV (Dunlop Valve)Valve Length:40 mmManufacturer Number:0181311Valve InformationTubes are available with various valve types. Choosing a valve is dependent on application and the rim's valve hole diameter. AV / Schrader Valve: Synonyms: Auto Valve (AV), Schrader ValveOuter Diameter: 8.5 mm DV / Dunlop Valve: Synonyms: Blitz Valve, Normal Valve (NV)Outer Diameter: 8.5 mmContents:1 x Continental Compact 24 inner tube Weight: universal | 32-507 to 47-544 | Schrader Valve (AV) | 24x1 1/4-1.75x2 Schrader 34 mm | 34 mm: 155 g universal | 32-507 to 47-544 | Dunlop Valve (DV) | 24x1 1/4-1.75x2 Dunlop 40 mm | 40 mm: 155 g Manufacturer: Continental Reifen Deutschland GmbH Continental-Plaza 1 30175 Hannover Germany info@conti.de