- 12, 14, 16, 18, 20 inch replacement inner tubes for RoyalBaby kids bikes
- 1.75" wide tubes for these models: Little Swan and Stargirl
- 2.125" wide tubes for these models: Freestyle and Space Shuttle
How do I know what size bike do I have?
Check the label on the seat post. eg: RB14B-6B, 14 Here means 14 inch.
Check the tire, 14x2.4, 14 here means 14 inch.
Measure your wheel diameter, 12/14/16/18 inch is the diameter of the wheel size.