Sorry I'm not all that clued up on tubing types... =[
I meant that when it comes down to it, it's a steel frame and steel fork. But I could, as was mentioned, buy a carbon fork for it at a later date.
So guessing the px frame is cheap steal? Not sure of the difference between 631 and 725.
Did think about this one, but is it pretty much the kaffenback? Did look on their eBay shop though and they have a Cda but not in the right size.