Originally Posted by
gl98115
Looking at the second photo, it looks like your saddle is too high. Do your hips rock from side to side when pedaling? Does it feel as if you are reaching for the bottom of the pedal stroke? Lower back pain has been associated to a too high saddle position in some riders. Your shoulder pain may be in response to that as well.
I'm glad you said it. I was going to, but figured someone would jump on me for it. To me, the saddle does look too high, and that will cause back pain. I would start here and get the seat height sorted out. At least then you will know if it is too high or not.
https://www.stevehoggbikefitting.com...ard-can-it-be/