I've got a similar FSA carbon crank set on my single speed with a 42 inboard and a matching Spot bash ring outboard. I have to admit that at first I got 'em just because I thought they looked awesome. But now that I've ridden them for a couple years I'd also have to say that they are the lightest, stiffest cranks I've ever mashed out of the saddle on. Everyone knows how that helps when you're standing and fighting or sitting and dying on a long hill. Simply outstanding. DanO