I'm sitting on the couch wondering what the hell did I do to my ass!?!? Then it dawns on me. I changed my stem from a 70mm to a 50mm about two weeks ago. I had taken the bike out on gravel for three days in a row (~100miles) with the short stem. Everything felt great. I was stoked. Today we went for a ~35 mile ride on smooth tarmac. I was struggling to maintain power and my hindquarters were hurting. Hours later and my sit bones feel like they were kicked by a mule. The difference? On gravel, I hover over the saddle. On the road, I perch on the saddle. Shortening the stem altered my hip angle. Amazing how a 20mm stem change can drastically change your pelvis angle. Time for a re-fit.
Wasn't sure where to post this. It would be cool to have a general topics portion 😉