Just got a GT Transeo 1.0, and it has Deore front and Deore LX in the rear. When I'm on the 2nd chainring, and pedaling HARD, I hear a noise similar to when the chain rubs the front derailleur, but it does it in all gears, not just at the extremes when only on that ring, and the clearance looks fine. First ring, and Third ring I dont hear the sound. It's hard for me to tell if it's front or rear sounding. Normal pedaling, everything is quiet, it's only when hammering down.
My question...what possibly is this, and is it ok to ride like this for a 100 miles or so before taking it back to the shop?