Size: 26" x 2.125"/2.35"/2.40"/2.50" Bicycle Inner Tube Compatibility: Fits most Mountain (MTN) Bicycles and Beach Cruiser Bikes PS-- 1.Please kindly confirm the size of your bike tire before you buy, width between 2.125-2.50" tire. 2.Before changing the tube, please check whether have some stones or sharp things that may broke the tube that stay in your tire. 3.Remember to always add a little air (to give the tube form) to the new inner tube before installing. This will prevent it from bunching up and/or causing a pinch flat or possibly blowing the tire off the rim (when you immediately and fully inflate) which ultimately will pop the tube. 4.Never over inflate past the recommended tire pressure.