I have an IRD Defiant, 94 bcd, that I bought for a late 80's Ochsner road bike. I bought it for the classic looks. They are really nice cranksets, aesthetically, weight and performance. I have it paired with an IRD bb, cannot remember model no., but one of their higher end ones, it spins very smoothly and makes a terrific combo. I have various rings for it, 30,32, 34 46 and 48 tooth. Only the original 30t and 46t are IRD. If the arms on yours were 170mm, I would buy it at that price. I am rebuilding Fuji Ace and that crank, in 170mm, would be a good fit for me and the bike. If someone is thinking about this, at that price it is a pretty good buy, IMO.