Another thing you can try is lowering your saddle a little bit. It takes pressure off of your sitbones when your leg is extended. I actually have my saddles almost 2cm lower than the calculations say it's supposed to be. If you try it bring it down just a little bit at a time. It will feel weird pedaling for a couple of miles but you get used to it. It hasn't slowed me down one bit, just don't get it too low or you could get knee pain. I basically like to feel like I'm sitting "in" the bike and not "on" it if that makes sense. You have to be flexible when it comes to all these recommended measurements for everything, not everyone is built the exact same way. A person with your inseam may not have hips, femurs, pelvis and every other body part exactly like yours.