My husband has Gliders, and one Stratos as well. I tried both at his urging and decided the Stratos was just a little too narrow. The Glider is possibly a little wide, so I got the Lite 209 because the Steve Hogg website put it's functional width about halfway between the two. A lot of women favour these two models. Sit bone width is sort of irrelevant to SMP saddles, but mine measure about 135, if that gives you an indication. The SMP site uses waist measurement, which seems very odd to me - according to that I'd need a very wide model like the Plus or the Avant.