I've got an 08 Mercier Kilo TT with stock cranks/BB and a powergrip pedal+strap setup

Everything's been tightened down.

With both sides, on the downstroke, I get a one or two short creaks.

On the upstroke, I get no creaks. Backpedaling gets the same short creaks.

I've checked my pedals and all the crank nuts. Is it just the crappy stock BB/cranks? They're truativ cranks btw. I've only had the bike for about two months.