Only applies to Royalbaby bikes. Black for boys/unisex bikes White for girls bikes Tips: 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.…
Adjustable length. Ideal for fitting to adult sized bicycles for people with balance difficulties. Fits 20" - 26". Also suits bicycles with derailleurs.