Strange clicking/cracking sound from rear wheel. D:
I keep hearing this weird cracking/ clicking sound on my rear wheel as it spins. I've looked around the tire and forks to see if there is anything protruding the wheel's rotation, but there is nothing. The only thing the wheel touches is the lever that holds it in place.
I tried removing the wheel and spinning just the gears, but I hear nothing. I also looked at the rod/lever that goes through the wheel and it is completely smootch.
After placing the wheel back on, I spun it and it makes the sound again. What could be making this noise? Should I be worried?