PU 90x24 82A BLACK N (4 pcs.) + ABEC-9 CHROME (8 pcs.) NILS EXTREME SET

PU BLACK NILS EXTREME wheels are made of polyurethane. The most important parameters of the wheels are hardness and diameter. The hardness of the wheels determines both the comfort of driving and the grip on the ground. PU-82A wheels provide good cushioning and excellent adaptation to any surface. The diameter of the wheels has a direct impact on the speed of driving. Larger diameter wheels allow for higher speeds, but do not guarantee as much maneuverability as smaller diameter wheels. ABEC 9 chrome is a very precise bearing, made of the highest quality chrome steel. It is characterized by the lowest rolling resistance, which translates into the highest speed in the American standard Annular Bearing Engineering Committee, abbreviated as ABEC. An important parameter of this bearing is eccentricity, i.e. roundness on the track in the inner ring, which is only 0.0012 mm.