Schwalbe SV13 Tubes are for labelled for 26" tyres, and widths from 1.5" up to 2.4". As recommended by Compass for their "Rat Trap Pass" 26in tyres.SpecificationsFits Tyre Sizes: 26" (Width 1.5" to 2.4")Valve Type: PrestaMfr Claimed Weight 190g