tFUnK,

I'm using B43s with Origin8 hubs. I have two sets for track so that I basically have 4 cog choices (and a spare set of wheels). I run them with Tufo tubular clinchers - and I've used them indoors on a very short track and outdoors on a 333.

They work for me, but I race cat 5. For that, it is competitive enough.

I picked them because I love the bombproof velocity rims on my cross bike, and my OEM wheels were junk. I love these and I'm not sweating a little bit of weight at 6'5" and almost 200lbs. My wife did give me the all clear on a set of Zipp 808s, and I'll buy them if I can get a category bump.