1. Durable Material: Made of thick, shock-absorbing butyl rubber, it is self-sealing and can prevent explosive punctures.2. Maximum shock absorption: Use these thick shock-absorbing butyl inner tubes to enjoy excellent driving performance.3. Safe Driving: Can ensure that no matter you ride on the road or off-road, bumps and tilts are reduced.4. Applicable off-road vehicles: suitable for off-road vehicles with rims of 25.4cm/10in and tire widths of 6.35-6.985cm/2.5-2.75in.5. Applicable motorcycles: The inner tubes are most suitable for motorcycles with engine capacities of 49 cc, 50 cc and 70 cc.Specification:Item type: bicycle inner tube.Material: RubberValve: straight valveWeight: about 250g/8.8 ozPackage List:1 x 2.50/2.75-10 inner tube