I switched the stock unbranded 16t cog on my rush hour pro to an 18t eai cog. While both cogs were off the bike, I compared their thickness. The eai cog was slightly thicker. Now when I ride there is a pretty much constant low noise coming from my drivetrain, not enough to sound harmful or degrading, but enough to make me notice it, knowing a silent setup is ideal. The aluminum frame is really stiff and resonates/amplifies the noise, I suppose it wouldn't be as noticable on a steel frame...anyway, if my eai cog is further outboard than the stock set up was, is there a way to adjust my bottom bracket slightly outboard to compensate? I really don't want to install the eai cog on flipped around. I don't have any calipers and intend to get my chainline measured at a shop soon, but wanted to get some advice here first. Thanks