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 100mm X-Firm wheels excel in sprints and track races to provide optimal performance but perform well in all conditions. Made in the USA with an exclusive dual-pour urethane formula, the outer ring enhances wear while the inner ring improves mechanical grip. X-Firm provide consistent speed, a high level of stability, are great in all race conditions for allround performance and versatility in track and road

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