Blackburn's Heavy Duty Inner tubes feature a 20% thicker casing under the tread to resist flats better than a standard tube. Their high quality mold-cured rubber creates consistent thickness without weak spots. Blackburn Heavy Duty tubes also include a pair of nylon tire levers to make removal and installation a breeze. Available in the most popular sizes to fit most bikes. 20% thicker tube helps prevent flats Bonus: two tire levers included to ease removal and installation Works with these bikes: Mountain, Cruiser Mold cured rubber for consistent side wall–prevents high pressure blow outs Schrader Valve Type
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