One for the Cannondale nuts:
I've got a real soft spot for the Cannondale six13 and have been after one for ages. A 52cm has popped up for sale which would be ideal but I've noticed that it has a aluminium top tube rather than the carbon top tube I've seen on other examples.
Is this because of the size? Do all 52cm six13's have aluminium top tubes? Or did they change at some point? It has the carbon down tube like all other six13's.