- 10 x 2.125 inner hose for Segway Ninebot F20, F25, F30, F40 and other electric scooters with the same size. Please compare the dimensions carefully before purchasing. - Ideal size and compatibility - Fits front and rear wheels of most electric scooters with 10 inch tubes. - The 10 inch hose may slightly increase top speed on compatible models. - Not suitable for scooters with smaller 6.5 inch tyres. - Material and durability - Made of high-quality butyl rubber for thick, shock-absorbing performance. - Replacement hose is 0.5 mm thicker than ordinary hoses, delivering higher damping. - Resistant to chemicals, weather, tears and abrasion. - Inflation and installation guidance - Recommended air pressure for the Ainiv hose is PSI 36. - Inflate to the hose's recommended pressure, not the tyre’s pressure, to avoid bursting. - Before assembly, treat the inside of the outer tyre to remove sharp objects (sand, gravel) that could pierce the tube. - Practical use scenarios - Scenario 1: Replace a worn or damaged tube on Segway Ninebot F20/F25/F30/F40 front or rear wheels to restore performance. - Scenario 2: Use as a spare inner hose for daily commuting scooters with 10 inch tyres to maintain ride quality and reliability. - Scenario 3: Install on scooters of the same size; verify compatibility by comparing dimensions before purchase to ensure proper fit.