laces (extra laces in box)

while minimizing friction

welded sole

grip and acceleration at these wheel sizes

Max Wheel Size: 60mm

Rollerblade Hydrogen Pro X-Firm 125mm Wheels 6-Pack Size:6-Pack laces (extra laces in box)Hydrogen Pro wheels are made in the USA with the highest quality materials, standards and attention to details to be used during all race conditions and leisure skates for consistent, top end performance on road, track, long distance and sprints. provides the extra speed required for athletic competitions. excellent, consistent performance, superior control in turns, great speed all track speed competitions They incorporate a multi layer technology,