在L E V O文字下方，我还有一个讨厌的裂缝。画框在下面时还会有吱吱作响的噪音"twisted torsion"。我不知道该怎么说。
The manufacturer has info about this. Local bike shop said that it's safe to ride and I should come back 如果有新东西出现 ahead. It's SW frame from Nov 2018 and 5 000 km when I noticed the crack. Now I have 1 000 km more and nothing new has appeared.