are you sure that's not crank/BB noise ? What happens when you bounce up and down, and then reverse the crank position and bounce up and down? Does it get louder when you pedal harder ? Does the tenor or prevalance of the noise change if you put the twin loc on lock out ?
What about if you stand next to the bike with the crank next to you in the bottom position, and lean the bike over and then stand on the bottom pedal and push down ? Does it make noise every time or do you have to alternate to the other side to "reset" the creak ?
Can you replicate it in anyway when you are not riding the bike ?
I had a creak I couldn't find for awhile - I put the front end in a bike rack so it was captured, held the top of the seat tube as hard as I could, and pushed the back wheel back and forth to replicate the creak and then have someone else determine exactly where it wsa coming from. I think in fact I had to take a crowbar and wedge it between the seat stays to recreate the creak. Don't reef on it or overdo it, but you do need to twist the bike hard enough to recreate the creak.
TBH I've had some creaking issues with this bike, and yet they always seem to come down to insufficient torque on the bearing or a bad bearing, so I ask myself is there really a problem with the bike ?
I find the rocker bearings to be especially problematic - the rockers seem to move too much for my taste even with new bearings, and seem to amplify any problems with movement in the other bearings.
It might seem strange that a new bike would have a bad bearing because it is, and I would be worried that some machining was out of spec or tolerances stacked up.
But we can't know that until you can somehow figure out where exactly its coming from. A creak always has a source and with good ears you can track it down, but for obvious reasons usually only once you can replicate the noise off the bike.
