The Schwalbe Tube No.17 comes with a 40 mm Dunlop valve. The butyl rubber tube is extremely airtight and elastic. The high elasticity means the tube covers a wide range of tire sizes.
The Schwalbe No.17 fits the following tire sizes: 40-609 (27 x 1.25) 28-622 (700 x 28C) 30-622 (700 x 30C) 32-622 (700 x 32C) 37-622 (700 x 35C) 40-622 (700 x 38C) 42-622 (700 x 40C) 47-622 (700 x 45C) 32-630 (27 x 1.25) 40-635 (28 x 1.5) ;
