Shortcomings of Red Star Kerr bullet

The disadvantage of the Red Star Hongxing Erke bullet is that the sole print will ring. According to relevant public information, when walking on a smooth road (such as a tile floor), the air in the pattern will be squeezed out, and when lifting the foot, there will be a clanking sound, so the disadvantage of the Red Star Hongxing Erke bullet is that the sole print will ring.