Originally Posted by
brandonk
Probably 50-75% of all bikes ever made have these.
OK, got it now, the kind with a tapered top that the seat clamps to. Old style, haven’t seen or used one in 30-40 years.
And as all I’ve ever purchased is high end and more expensive bikes, I could not at all recall what the OP was using.
@ OP, I would be removing the crank and bottom bracket and pushing from below.