Originally Posted by
alexihnen
Nice bike!
Thanks
And I thought it was that one too at first, but they're slightly different. Some frame details are off, like the fast back stays. That catalog page must be from one year prior or something.
Typically, 753 tubing used a 27.4 seapost. I would check first. If you use a 27.2 and clamp it down, you might crack the lug. Don't ask me how I know.
There's a great blog run by a huge Raleigh fan where they've accumulated tons of info specifically on 753 frames built by the SBDU workshop. They wrote up a blogpost about seat posts (or pins, as they like to call them), and I feel confident that it's truly 27.2. Thanks for the warning, though, would be a shame to wreck a frame like this from such a mistake.
https://raleigh-sb4059.com/2017/02/0...seat-pin-size/
They've also got a whole video specifically about SBDU bikes built with fastback stays. Here if anyone's curious: