Choosing the Right Saddle
A saddle should do more than simply protect you from your seatpost. Like the rest of your gear you depend on, it should fit perfectly. There should be no compromises here. Aside from components and proper sizing I think the proper saddle fit is one of the most , if not thee most important fit to get right. There is nothing worse than developing soreness well into a ride. I have been there and its not fun.
Until now, saddle width had been determined by little more than an educated guess based on myriad opinions and a few calluses. But physiology makes it clear that different riders, even those with identical waist sizes and weights, can have different sit bone width measurements. Thinner saddles are not always best. There is one primary determinant of proper saddle width: the distance between the ischial tuberosities (a.k.a. “sit bones”):
Related to this is rider position: as a rider rolls forward into a more aggressive aero position, the sit bone placement tapers closer together. As a result, a more comfortable endurance position requires a slightly wider saddle than a faster, more aero position would require.
So without dimensions like waist measurement available as a reliable way to determine sit bone width, and because perceived comfort is a poor substitution for a measured fit, we developed the Body Geometry Saddle Fit System to provide an easy way to accurately measure your actual sit bone width. Once you’ve been measured, then its time to finalize the racing saddle design.
After 2-3 weeks, and your butt still hurts, I recommend changing your saddle immediately.