Originally Posted by Traifster

So I bought my first fixed-gear from a wonderful gentleman on craigslist. It's an Iro Mark V with a bunch of upgrades (brooks saddle, soma pedals, thomson stem and seatpost etc) and I'm absolutely loving it so far.

When asking him if the frame was a Pro or not though, he wasn't sure. At first he thought it was just a regular Mark V, but he was also under the impression that it was Reynolds steel and not Cro-Mo. How can I tell the difference?

Either way I'm quite happy with my purchase, just curious really.