Stop bicycle flat tires with Slime Tube Liners. Our one-size-fits-most liner installs easily between the bicycle tube and tire to offer powerful puncture protection. These lightweight tube protectors provide a physical barrier, deflecting nails, glass, thorns and other debris to prevent punctures in your bike tubes. FEATURES: Tube protectors, or tire liners, are designed to protect your bike tires from punctures Installs easily between the tube and tire to offer powerful puncture protection Provides physical barrier to block nails, thorns, and other debris New liners are now 17 percent lighter and 27 percent stronger One size fits most tire sizes: 12-26 x 1.5?-2.125?