What is the best in line skate?

Ball bearings allow the wheels to rotate freely and smoothly. Bearings are usually rated on the ABEC scale, a measure of the manufactured precision tolerance, ranging from 1 (worst) to 9 (best) in odd numbers. The ABEC standards were originally intended for high-speed machinery and not skating applications. While higher rated bearings are generally better in overall quality, whether they automatically translate to more speed is still questionable. The quality of the steel used is also very important, but is not rated by the ABEC scale. In any case, the general opinion is that if one has the money or inclination, higher ABECs certainly can't hurt. ILQ Scale, is another measure scale, which tries to solve the material issue by considering precision tolerance, design feature, lubrication and materials quality. But beginners should, if possible, use the lower scale bearings. The lower ABEC scale bearings exchange speed for better control and a smoother ride. Note that bearings alone won't make up for poor technique or lack of fitness.