Inner tube 18 inch for tire 4.0 MM 110/100-120/100-120/90-130/80-130/90-140/70-140/80

Inner tubes are made of 100% natural rubber and are available in three different thicknesses depending on their use:
The 4.0 mm (UHD) version is heavier but can withstand extreme stresses! This inner tube is absolutely exceptional when it comes to puncture resistance. Among its main strengths is the inflation valve. The valve is normally the weakest point of the tube, and our tubes in most sizes use the TR6 standard instead of TR4, unlike most inner tubes on the market. This particular standard allows for an elliptical rather than circular reinforcement area, which guarantees greater tear resistance while remaining very flexible and adhering to the rim.