Do you sit squarely on the saddle or do you sit towards one side or the other?
(If you go on a group ride and look at the other riders you’ll find that most riders sit to one side or the other. Often it’s just a centimeter or two and sometimes it’s 3-5+ centimeters. It actually seems rare that someone sits exactly dead center on the saddle.)
I had a problem a couple of years ago when I ramped up my mileage. Basically I was getting a lot of abrasion under my left sit bone area. At first I thought it was a saddle sore or ingrown hair. Then I got tons of swelling and pain in the area after increasing base miles to 13-15 hours per week. The doctor thought I burst a blood vessel in the area.
I recovered from that over a few weeks. After a week I could ride with two pairs of shorts. I played around with many different saddles and rode around on a Selle Anatomica for a long while.
As an experiment I decided to try and force myself to sit squarely on the saddle. This feels super weird to me. If I sit on the saddle normally I’ll settle in at 2cm to the right of center which brings the left closer to the edge of the saddle. I force myself to pick my butt up, move it left, and plant it square. It feels totally weird.
Despite the weird feeling, this has alleviated the pressure spot I used to get on the left. I figure that I have some kind of pelvic asymmetry.
I also started using an SQLabs Active saddle which allows the rear of the saddle to rock back and forth. I think this helps with the asymmetry. I also found that Assos shorts ageed with my behind the best.
I feel like it’s still an ongoing experiment. While working fine, the SQLabs saddle is a flat shaped saddle. Back in the day, I used to always gravitate towards the Selle Italia Turbo which is a very rounded saddle. And I always used to hate hard flat saddles. I do think by sitting centered on the saddle I could probably use any of my old saddles without too much problem.