- These will help him hone his skills while looking cool in the Ion Boys Inline Skates. This expandable skate with an aluminum frame and great Urethane Wheels are sure to provide a smooth, quiet and confident ride. Designed to grow with him, the Ion adjusts up to four full sizes. Easy push button adjustable sizing, deluxe comfort liner, and power strap. Aluminum Frame. Polyurethane wheels. Gold-7 Speed bearing. Size MD shoe size 3-6 size SM Shoe size 12-2
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