Continental standard weight presta valve tubes. Seamless and mold cured construction. Presta and Schrader have removable valve cores. Presta and Schrader valves are threaded full length. Weight: 155. Valve: Presta Med 41-55mm. ISO Diameter: 559 / 26" mtn. ISO Width: 32. ISO Width: 33. ISO Width: 34. ISO Width: 35. ISO Width: 36. ISO Width: 37. ISO Width: 38. ISO Width: 39. ISO Width: 40. ISO Width: 41. ISO Width: 42. ISO Width: 43. ISO Width: 44. Labeled Size: 26 x 1.25 - 1.75. Tube Compound: Butyl. Valve Core: Removable. Presta Shaft TYPE: Threaded.