I've picked up a frame that I've stripped the components off cleaned it up a little.
I've come to a point where I need some idea of a manufacturer.
Ignoring the fact that it wears a Tange Infinity sticker, its at least half a pound lighter than my Centurion Sport, which I know is Tange Infinity.
There's steerer tube rifling, but 6 wide vanes, not the typical 5 Columbus vanes. There's no dove on the steerer tube, or anywhere else. I've never seen a manufactured Infinty frame with the seat stay joining detail at the seat tube like this one. Nor with dropouts like this on the fork or the frame.
The seat post is 26.8mm diameter. The whole frame weighs about 3.2kg with fork and headset. I dont know what diameter the fork crown race is.
Anyone got any ideas or clues that might point to a more definitive manufacturer or type?