I recently obtained a 1988 frameset for a project, according to the previous owner it has Tange tubing, after measuring the tube diameters ( 31.8 top and down tubes and 28.6 seat tube) the closest tube set from Tange seems to be the Ultimate superlight, the seat tube is ovalised at the bottom bracket. Anybody any idea I've been going round in circles trying to figure it out.
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