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, Mtech®, which is comprised of two layers of urethane to provide the ultimate footprint (for grip), rebound (speed/energy return), roll and wear. This combination with the core makes it the most responsive wheel you can put on your skates. Hydrogen Pro 125mm XX-Firm wheels are designed for marathons and open road races by providing optimal performance. Made in the USA with an exclusive dual-pour urethane formula, the outer ring enhances wear while the inner ring improves mechanical grip. XX-Firm deliver the highest durability, grip extremely well on smoother surfaces, have a high level of stability and optimum in straight line speed
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