Every mile over rough terrain, gravel, sand or debris is a potential flat. Place these Fat Tire Liners into your 20"x4" to 26"x4" fat tires and ride like you mean it. Rocks, glass, thorns—whatever’s on the trail, these liners eat it for breakfast. Built tough, easy to install, and made for rough terrain MTB, fat bikes and e-bikes. Less fixing, more ripping. Go harder, roll further, and won't let the stone fragments stop you. The liner is used to be placed between the inner tube and the tire. After being inflated, it will be firmly fixed and will not slide.
