It is easy to check tire size from the sidewall of the bicycle tire. 【Bicycle Tube Size】Schrader valve 20"×4.0" heavy duty fat tire tubes. Valve length/type: 32 MM schrader valve with cover. 【High-Quality Materials】OUXI bike inner tubes are made of high-quality butyl rubber material.

It is easy to check tire size from the sidewall of the bicycle tire. 【Bicycle Tube Size】Schrader valve 20"×4.0" heavy duty fat tire tubes. Valve length/type: 32 MM schrader valve with cover. 【High-Quality Materials】OUXI bike inner tubes are made of high-quality butyl rubber material.