My new Brooks was making this gawdawful creak yesterday every time my left foot was on the way down and my right foot was on the way up. I shifted around trying to make it stop and just couldn't.

When I got home I bounced around on the seat, and couldn't make it creak. I ran over bumps, no creak. I TWISTED the back end (left down, right up) with my hands and got the creak. Played around, and it turns out I was shifting my bod to the left and pooching out my abs and just generally being a sack of potatoes when my left foot was on the downstroke.

Who knew?

Today I concentrated on holding in my abs ALL the time (instead of just half the time) and keeping my posture steady. Much better. I still get the creak when I'm struggling up the steeper hills, but I'm such a wuss that I have to throw my weight around just to make it, even in my monster granny gear. Hopefully I will get my posture and pedalling more efficient on the hills someday. Meanwhile, you can hear me coming from a mile away!