Steering. This was on a pass descent with some traffic. Every time a vehicle passed, I had serious trouble controlling it. Almost a death wobble, but not quite. I was using the same Rolf wheels I use with no problem on my Trek. I was doing 40-50. Terrifying. I assume something to do with the crit or CX oriented front end geometry. I've done many, many high speed pass descents.

The bike climbs fine but not noticeably better than my other singles. On rough surfaces it's no fun at all.