Originally Posted by
nomadmax
The 130mm rear spacing would give me pause. It was my understanding they were 126mm. Additionally, the 753 tubing was not recommended to be coldset. So how it got to 130mm would be something I'd want to know.
Original 753 had an extreme heat treating process, which was given as the reason for no coldsetting and the reason tubes down to 0.376 would be durable. Heat treating in general was evolving rapidly in 70s and 80s. I have long wondered if later 753 continued to use the same heat treatment. Or if there was any way to know which 753 stickered frame absolutely could not be coldset and which ones could be handled normally.