Roller skates Outrace Funny Blue PW-117J good, durable ABEC 5 Carbon bearings. Roller-skate inline skates designed for the user within the body weight range 20-60kg. Shoe adjustment system enables quick change within the limits of four sizes The size adjustment is secured with a lock. Converting the roller skates into rollers consists of adjusting the wheel using the enclosed key according to the instructions. Technical data:·3 - step closure (two-section buckle with protection, laces, velcro) ·bearings - ABEC 5 Carbon·hardness 82A PU·skid · material PP·user weight from 20 kg to 60 kg Size knob:26-29 and 30-33 -  64 mm34-37- 70 mm38-41 – 72 mm Sizes: 26-29: 16 -18 cm (3 k )30-33: 19  21 cm34-37: 21 – 23.5 cm38-41: 23.5 – 25 cm