Details: 18’’ x 1.75 1.95 2.125 Road Mountain Bike Replacement Inner Tubes: Fits most bikes with 18” tires that is 1.75 to 2.125 wide – 32mm Schrader Valve. ADDS COMFORT TO YOUR RIDE: With thick butyl rubber that absorbs shocks, you won’t feel the bumps and hollows because your bike will glide along, protecting you from the force. Now that’s comfortable. SAFETY FIRST IS OUR MOTTO: We designed this inner tube to be explosion proof. When and if punctured, it immediately creates an airtight seal to prevent damage, destruction and injury to the rider. Safe in any season or weather condition. NO TOOL INSTALLATION: With our tire levers came for free, in less than 5 minutes, you’ll be back on the trail or track! Replace the inner tube quick – so simple, easy and fast! MADE HEAVY DUTY FROM QUALITY MATERIALS: It’s our job to make dependable and durable inner tubes and we do it right! Count on AR-PRO!