Ontherivet77 wrote:Just guessing but it may be the result of a leg length discrepancy/imbalance. IE you've got your saddle set correctly for the longer leg, which is forcing you to reach for the pedal with your shorter leg, which in turn is causing the pressure to that side of your sit bones.
Have a read of Phil Burt's book on Bike Fit or better still visit a bike fitter for advice.
My left leg is 11 mm shorter than the right. My doc sent me for an X-ray which showed this up. It doesn't bother me walking, but sitting on any kind of gel or hard saddle hurts like hell after ~80km.
I rode long distances in discomfort for years, then discovered Selle Anatomica (https://selleanatomica.com/collections/x-series
). The leather is supple, and the two halves of the saddle move quasi-independently. I did PBP 2015 on it, wearing Assos shorts: I had no pain and no chafing to speak of, certainly not on the level I had after other 1000k rides with other saddles. If this sounds like a testimonial it is, but I've no connection with them other that through my shorts. I believe that Rivet do a similar saddle if you've got the money.
My advice is to get to the doc and ask for the X-ray. If that shows up a difference then look at Selle Anatomica. If you can order one pre-punched for laces, do, otherwise the leather can spread and cut into your legs. You can drill it yourself: 4mm bit with a block of wood on the other side. I used a 3-point wood drill and a boot-lace, chum uses cable ties.