Continental Lightweight Presta tubes. Seamless and mold cured construction. Removable valve core. Presta and Schrader have removable valve cores. Presta and Schrader valves are threaded full length. Weight: 125. Valve: Presta Med 41-55mm. ISO Diameter: 559 / 26" mtn. ISO Width: 44. ISO Width: 45. ISO Width: 46. ISO Width: 47. ISO Width: 48. ISO Width: 49. ISO Width: 50. ISO Width: 51. ISO Width: 52. ISO Width: 53. ISO Width: 54. ISO Width: 55. ISO Width: 56. ISO Width: 57. ISO Width: 58. ISO Width: 59. ISO Width: 60. ISO Width: 61. ISO Width: 62. ISO Width: 63. ISO Width: 64. Labeled Size: 26 x 1.75-2.5. Tube Compound: Butyl. Valve Core: Removable. Presta Shaft TYPE: Threaded.