garethrl
Senior Retro Guru
Hi folks,
I'm finally (but still slowly!) getting round to building a TI Team replica with the 753 fastback frame I bought last year. I'm having trouble with the seatpost though! I was told that the seat tube was 27.0mm and when it arrived I measured it with a caliper and it read 27.0. All good, so I bought a nice DuraAce post - it's stamped 27.0 on the shaft, and measures 27.0 with the same caliper - but I can't inset it more than ~3cm into the frame! It doesn't clear the minimum insertion level, and just about gets past the bottom of the slot in the seat tube.
What's going on here? Is it possible that the frame is 26.8mm but has been slightly flared out at the top. What size post do I need?? The frame is an SB stamped one from the early 80s, so what would the norm have been back then?
Cheers, Gareth.
I'm finally (but still slowly!) getting round to building a TI Team replica with the 753 fastback frame I bought last year. I'm having trouble with the seatpost though! I was told that the seat tube was 27.0mm and when it arrived I measured it with a caliper and it read 27.0. All good, so I bought a nice DuraAce post - it's stamped 27.0 on the shaft, and measures 27.0 with the same caliper - but I can't inset it more than ~3cm into the frame! It doesn't clear the minimum insertion level, and just about gets past the bottom of the slot in the seat tube.
What's going on here? Is it possible that the frame is 26.8mm but has been slightly flared out at the top. What size post do I need?? The frame is an SB stamped one from the early 80s, so what would the norm have been back then?
Cheers, Gareth.