Baakyeek Bicycle Butyl Rubber Inner Tube 14" 16" 20" 24" 26" for MTB Mountain Beach Bike Tire ,Black Very tough, impermeable, air retentive, flexible compound. More than 120 days no need to supplement Air Pressure. Air tightness, high strength, High toughness. We sell 26"*1.5_1.75"/26"*1.75_1.95"/24"*1.75_1.95"/20"*1.75_1.95"/ 16"*1.75_2.125"/14"*1.75_2.125",pls choose suitable for you