I just purchased a cruiser bike online that I had to assemble.
When I rode it for the first time, I notice my pedals felt shaky, whether pedaling or coasting, and when I did pedal every few seconds they made a crack/pop. I don't feel anything abnormal when this happens.
Turned the bike over, and I noticed the chain shakes too. It is tight, but the wheel looks as if it is up as far as it can go- it looks like if I adjusted it further to loosen the chain, I'd be at risk of it falling off.
I opened up the wheel sprocket- no broken ball bearings
Does any one know why this is happening, and if its an easy fix or defective bike that I need to return?