I just bought a Simplex post for my Grubb frame, and it goes in very tightly, and then, after a few inches, I can't push it down any farther. I'm wondering what I'm hitting.
The person I bought the frame from told me that the seatpost diameter is 26.4, so I measured it as well as I could, and it seemed to be about accurate. I then bought a 26.4 Simplex,
and like I say, even though I greased the inside of the seat tube and the post, it goes in very tightly.., and then stops about 1/2" short of where I need it to be.
Why would a post stop in the seattube? Do I need a 26.2 seat post?
The flanges for the binder bolt are angled slightly away from eachother with the post in.
I think the tubing is straight guage, either A&P or 531.
Mid-1950's frame.

198