Properties: Spokey JOY adjustable children's roller skates: thanks to the size adjustment option, they grow with the child – it is also an optimal solution for those who wear a size that is on the borderline, were created for the youngest skating enthusiasts who are just starting their roller skating adventure, They are equipped with a triple fastening system (laces, Velcro and a two-section buckle) that ensures maximum safety while riding. Technical data: adjustable rollers skid: aluminum bearings: ABEC7 Carbon wheel hardness: 82A wheel size: 27-30 - 62 mm, 31-34 - 64 mm fasteners: two-section buckle with safety, Velcro, laces maximum user weight: 60 kg unique design