19-05-15, 09:12 PM
You've kind of already answered your own question.
By adjusting the chain you would've had to move the wheel, and by doing this although you may think it's as exactly straight as before it's highly likely it's in a slightly different position.
So the plastic rubbing noise you can hear is the chain cutting a new path on the plastic chain guide, underneath the top of the chain near the front sprocket.
It's not a problem, just a bit annoying for a while until it beds in again.
By adjusting the chain you would've had to move the wheel, and by doing this although you may think it's as exactly straight as before it's highly likely it's in a slightly different position.
So the plastic rubbing noise you can hear is the chain cutting a new path on the plastic chain guide, underneath the top of the chain near the front sprocket.
It's not a problem, just a bit annoying for a while until it beds in again.
More people are born because of alcohol than will ever die from it.