27.2! Turns out that I was misreading my little brass caliper. And my electronic one needed to be reset. No shim present. I cannot believe that I never thought to look at the post itself for a size! So now, I just need to buy a quality post that gives a larger range of angles and is micro-adjustable. Jensons has a Zipp Service Course post for $49. The Thompson Elite is about $120. Is it worth the extra $70? The Thompson is also offered in a "set back" position. That looks cool, but I have no idea what the functionality of that kind of post offers. There's also a Ritchey WCS for $99, but it's my understanding that that post is a real PITA to set up. Any suggestions will be greatly appreciated. Keep in mind that I'm mounting a Selle SMP Dynamic saddle, which is a strange design to begin with, to include the angle I need to dial in. Thanks!