Took a short ride today. By the 6 km mark I noticed a bit of mid to lower back pain. I wasn't even riding in the drops, but on the flats of my bars.
Have I been riding with the bars too low/saddle too high? I feel like the stroke of my leg is comfortable, and I'm not sure if I want to lower my saddle anymore. But am I right in diagnosing the root of my pain?
Make sure you aren't sitting with a straight back. If you already ride with a curved back then its possible that your bars are too close. How long have you been riding that bike with that setup? Its possible you just aren't used to it?