Continental Tubes Presta and Schrader have removable valve cores. Presta and Schrader valves are threaded full length. Weight: 55. Valve: Presta Long 56-74mm. ISO Diameter: 622 / road / 29". ISO Width: 18. ISO Width: 19. ISO Width: 20. ISO Width: 21. ISO Width: 22. ISO Width: 23. ISO Width: 24. ISO Width: 25. Labeled Size: 700 x 18-25. Tube Compound: Butyl. Valve Core: Removable. Presta Shaft TYPE: Threaded.