I have the S60 set on my tri bike and can't understand why anyone would commute on the S80. First off it's a 600 dollar carbon wheel, sure it's sturdy, but not nearly as sturdy as an Open Pro with a good hub for 400 bucks less. Secondly it's a super deep wheel, which will be pretty tough to handle in any real windy conditions, as well as making it tough to lock up and be a complete theft magnet. Finally, they just aren't that comfortable to ride, not compared to a well built training wheel. And this is just me being a dick, but I don't think I've ever seen a fixed gear rider around town going fast enough to warrant a deep wheel for aero benefits.