On Wednesday, October 3, 2018 at 3:08:20 PM UTC-5, AMuzi wrote:

I plead TLDR on this. It may or may not be in he

https://www.cpsc.gov/Regulations-Law...ules/Bicycles/

or he
https://www.federalregister.gov/docu...s-for-bicycles

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

I had no idea this is how the minimum insertion mark on a seatpost is set.

§ 1512.15
Requirements for seat.
(b) Seat post. The seat post shall contain a permanent mark or ring that clearly indicates the minimum insertion depth (maximum seat-height adjustment); the mark shall not affect the structural integrity of the seat post. This mark shall be located no less than two seat-post diameters from the lowest point on the post shaft, and the post strength shall be maintained for at least a length of one shaft diameter below the mark.