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Schwalbe SV 19 set of 5 27.5, 28, 29 inches 40mm valve length Presta valve; Product description Schwalbe SV 19 trousers - set of 5. For touring, trekking, cross bikes and mountain bikes, 650B/27.5\; Product description Schwalbe SV 19 trousers - set of 5. For touring, trekking, cross bikes and mountain bikes, 650B/27.5\; Schwalbe SV 19 trousers - set of 5. For touring, trekking, cross bikes and mountain bikes, 650B/27.5\