This LotFancy 20” bike inner tube fits all 20 x 3.50 20x3.60 20x3.80 20 x 4.0 Fat tires bike(Please kindly confirm that your bike tire is 26inch before you buy) 32mm Schrader (Regular) Valve. Our bike inner tubes are made of butyl rubber material. Better air tightness, heat resistance, and durable. Suitable for most of bicycles wheels. 【NOTE】Make sure inner tube match with the size of tire; Inflate a little air before installment, to avoid crack or damage during installment; Install the valve correctly, which must be 90° with steel, and the nut must be well locked; After installment, please check the tube is at the right position between steel and tire, make sure the tubes are not clamped by them; Then inflate the air according to pressure standard of tire.
