BPBIKE Mountain Bike Bicycle 650B Inner Tyre Tire Interior Tube 27.5in 1.9-2.125 A/V Schrader Valve 27.5*1.9-2.125 650B Schrader Valve Mountain Bike Tubeless Puncture resistance: better protection tire Wear: high quality rubber Classic Schrader When the tube is not loaded tire, check for leaks when the inflatable, inflatable inner tubes Do not exceed 120%