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The PU BLACK MATT NILS EXTREME rollers are made of polyurethane. The main parameters of the rollers are hardness and diameter. Hardness affects both driving comfort and ground grip. The PU-82A rollers offer good shock absorption and excellent adaptation to any surface. The diameter of the rollers has a direct impact on driving speed. Rollers with a larger diameter allow for higher speeds but do not provide the same maneuverability as rollers with a smaller diameter.
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.