Description: Made of premium butyl rubber. It has the advantages of good sealing performance, ozone resistance, aging resistance, shock absorption, and electrical insulation. Replacement tires ensure better shock absorption and enhance the riding experience. Your safety and comfort are our primary concerns. Compatibility: 26" x 1.95" Tire: Cityscape, Race 20" x 4" Fat Tire: Mars, Ranger 27.5''x1.95''Tire: Race Max 26''x4'' Fat Tire: Explore Note: When replacing a bike's inner tube, be sure to add a little air before installing it. This way it won't twist or curl, which can lead to pinch flats. Inspect for an even bead of the tire to the rim on both sides.