Originally Posted by
Steve_sr
There are no local frame builders in this area. I located the one who closed up shop during the pandemic and he moved back to the left coast somewhere.
Someone can correct this if my thinking is backwards but my objective here is to suitably constrain the seat post so that it does not rock in the bore and eventually fatigue the frame near the clamp. So the added shim will take up the slack at the bottom of the existing shim while the clamp will take up the slack at the top of the frame and prevent it from moving. I am not sure that support (or contact to the shim/seat tube) between these two points is relevant.
The bottom of the bore was measured by how many .003" x 0.5" Coke can shims that I could fit down the bore with the seat post. Crude but effective measurement.
I would question that this is an effective measure.
I would get ID calipers
https://www.amazon.com/iGaging-Insid...711357&sr=8-11
or a bore tool
https://www.amazon.com/Beslands-Tele...s%2C164&sr=8-2
the idea that the bore is tapered is really odd to me.
Did you ever ride the bike with the loose seatpost and maybe increase the size at the top? or maybe the builder did?
here is a video about moots and it talks about seat post insert at around minute 14
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(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)
Last edited by squirtdad; 12-11-22 at 01:23 AM.