I got measured tonight using a method I found on another post here. Wooden chair, feet elevated about 8 inches, rocked side to side on a damp paper towel that was between two sheets of paper.

We tried several times and always got numbers in the 142 range (from center to center of the ovals left in the paper). My hubby (as you both said) thinks that the SI is probably ok on width but "flares out too fast" (his words).

I checked out a Jett and Ruby today. The Ruby seems a lot firmer than my current saddle, so I'm a bit iffy about it. The Jett seems like it may be too much padding. I don't to sink in the rear and chafe in the front. The store had neither size in a 155, but with a 30 day return policy, I feel pretty safe in trying both.

Thank you for the input!

ST