Hello, I noticed my rear sprocket isnt aligned today when I first put the bike on rear wheel stand. Sprocket waves and chain snakes slightly on idle in 1st gear. After trying to balance the wheel with increment indicators on axle sliders i noticed some damage that might be resulted from hitting a pothole (I live in new york city) or forgetting to loosen the axle nut when adjusting chain slack (im still learning). The bearings are fine i had them changed with new tires chain and sprockets some time ago. Chain isnt unevenly stretched either. I have already ordered this part. Could it be the cause of my problem or i should keep looking?