Blackwheels Sonic Rollers 40-43

Blackwheels Sonic roller skates have  a quick size change mechanism , thanks to which you can change their length in a range of up to  4 sizes without the use of tools . At first glance, there is nothing extraordinary about it, because  adjustable roller skates  have been popular for many years. However, Sonic are special - their structure has been designed so that when extended to the maximum length, the rollers retain their  strength  and  stability.
In the case of people starting their adventure with roller skates, the most depends on the first impression. If they fit properly and develop good skating skills quickly, roller skating will become one of their favorite outdoor activities. In the case of advanced ones, a good fit is crucial. Sonic Blackwheels skates have  an anatomically shaped shoe  that perfectly adapts to the foot. Roller lacing  and  a buckle fastening the shell collar  guarantee ankle stabilization, and  the strap  placed at the right angle presses and stabilizes the heel

Adjustable:  Yes
Wheel diameter  [mm]: 76
Type of wheels:  Polyurethane
Shell:  Power Flex
Liner:  BW Comfort
Skid:  3D Aluminum
Wheels:  Blackwheels PowerSpeed
Wheel material:  PU
Wheel hardness:  82A
Bearings:  ABEC-7
Closure:  Classic Strap System
One Step Adjustment size adjustment
Brake on the right roller