I was measured at my local Specialized dealer and bought a $150 seat as a result. The new seat hurt more than the old. I was in so much pain I dreaded dismounting as the blood rush to the painful area would make my eyes water. In desperation I took a chance on a B17 and have never looked back in over 1000 miles. I dont even think about my buns anymore and Im 285lbs - great saddle. Only issue is you really should not get it wet. I carry a showercap that fits the seat on such occasions.