Found this thread over on the UK site…
And borrowing a few images to keep here. Kudos to the posters there for this.
Notes:
"My Zelenda J17B measures 3.1194
A crank I have measures 3.1252 so the tool undersizes the
seal by .0058"
So it appears that the space between the seal and the journal is apx 0.0029".
Now, with that in mind, as the crank itself AND the seal expands with heat, contact likely ultimately occurs, as evidenced by the shiny areas on my journal after 20 years of use(apx 15k miles)
So using shim stock, 0.003" thick, to size the new seal might suffice. Good idea.
Rich