Positive and negative tooth design, reduce chain wear, not easy to drop the chain, efficient rotation. High-strength road and off-road, AL7075 enhances rigidity, strengthens, and does not break when pedaling.
Axle chrome molybdenum steel 24MM hollow integrated shaft, chrome molybdenum steel strengthens the strength. The thickness of the positive and negative toothed discs is 5MM, which is 1MM more than the commonly used discs, and the strength and rigidity are higher.