Here is our 8-1/2"x2" (225x48) scooter inner tube: a formerly odd size that is now being used on a number of recent Chinese-made, medium-sized, recreational gas and electric scooters. Rumor has it that this scooter inner tube is also being used on some high-end baby strollers. Talk about scooter babes! Please check the Compatibility tab for a few examples of the many scooters that are rolling on this size. Whether you call the size 8-1/2"x2", 225x48, or 8.5x2; this is the scooter inner tube that you need. And at Monster Scooters Parts low price, you can afford a few spares. NOTE: Compatibility lists are compiled based on information from various sources and are accurate to the best of our knowledge. However, please verify your tire size by checking the sidewall markings. Known Compatibility: ![]() | |