Fantastic, thank you. I've owned my since new so I must have cut the bars down enough that the Cr-Mo bit is missing. Mine are 615 wide now so I guess they must have been 650-670mm originally? Now I wish I hadn't but there must have been a reason ...
I've just stripped and rebuilt it. I considered a respray but decided to keep the original 'patina' in the end. It's surprisingly nippy, and the biopace rings which I had turned on the spider are now back in the original position and work very well. All is original except for the seatpost, seatpost bolt and saddle.
Anyone reading this who may have a source for biopace chainrings, an original handlebar or a 14-17-20-24-28-34 freewheel please contact me.
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