You can't hear it unless you put your ear to the wheel. I couldnt tell that it was happening until I noticed some hair stuck between the wheel and the frame and decided to clean it.
Spin tested them all and noticed one vibrated/purred on my fingers, while the others didn't. On the outside it doesn't look different to the others. On my right skate it's the back wheel and on the left skate it's the 2nd to last wheel, but way more faintly
I have skated them like that for less than 10 hours total, and I didn't have problems. They feel pretty responsive and stable, and the wheels are silent on good ground.
Should I worry? Is it fixable at home? And if I need to take out my bearings, would you suggest I do it without the special tool? Thanks yall
Edit: I also used a toothbrush to clean around the bearings and to get rid of the hair stuck in the protective ring of the bearing. Does that mess with the lubrication? Doesn't feel like it does bit should I re-lubricate them??