Rotor 3d+ cranks, triple, BB30. I ran these with a single ring and XX1, worked perfectly. These have one season of racing, dirty but no dents, dings, bends etc., in great shape. If you're looking, you know these are the stiffest and among the lightest cranks made. I have these cranks on most of my bikes and have ridden most others, these are by far my favorite. I'd have them on this years race bike, but it wasn't BB30... dammit. Retail is $600 new, save some serious cash. $325/obo, buyer pays shipping and paypal fees. PM with questions!