??? If I see one more involved measurement system for determining the distance between sit-bones I will blow chunks. The last one I actually tried was: cardboard... the cardboard was supposed to crush exactly where my sit-bones were... uh... no, it didn't. Neither did the aluminum foil on carpeted stairs... proprietery systems measure your sit bones for their saddles... then I got smart... I got my trusty dusty tape measure and put the end on one of my sit bones! I felt for the other sit bone and... ... 100mm. Apparently thats about standard for a dude, which I am. EASY PEASY. Do it several times to be sure. Now you can shop for saddles knowing just how wide you are in universal metric units. The end.

H