Well i got a new windsor the hour. Nice bike for 300 bucks besides the drivetrain noise.

I am not sure what the problem is, when i push harder the noise increases and it is somewhat similar to grinding but not quite... it is kind of a vibrating sound

I hear new bikes have more noise... so should i give it time?

The chain is tight, should i loosen it? How do i know when to stop and should i use any tool other than myhands to tension a chain.

Lastly, i hear BD has a problem with greasing bottom brackets, could this be the problem? Any windsor the hour owners are able to chime in?

Thanks for the help guys